WO2019053759A1 - Capteur de température à infrarouge - Google Patents

Capteur de température à infrarouge Download PDF

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Publication number
WO2019053759A1
WO2019053759A1 PCT/JP2017/032735 JP2017032735W WO2019053759A1 WO 2019053759 A1 WO2019053759 A1 WO 2019053759A1 JP 2017032735 W JP2017032735 W JP 2017032735W WO 2019053759 A1 WO2019053759 A1 WO 2019053759A1
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WO
WIPO (PCT)
Prior art keywords
infrared
conversion film
heat conversion
case
area
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Application number
PCT/JP2017/032735
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English (en)
Japanese (ja)
Inventor
祐子 宇南山
中山　法行
守富 濱田
今野　達也
Original Assignee
株式会社芝浦電子
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社芝浦電子 filed Critical 株式会社芝浦電子
Priority to PCT/JP2017/032735 priority Critical patent/WO2019053759A1/fr
Priority to JP2019518329A priority patent/JP6892500B2/ja
Publication of WO2019053759A1 publication Critical patent/WO2019053759A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/04—Casings

Definitions

  • the present invention relates to an infrared temperature sensor that detects infrared light from an object to be detected and measures the temperature of the object to be detected without contacting the object to be detected.
  • a noncontact infrared temperature sensor that detects a temperature without contacting a detection target is used, for example, to detect the temperature of a toner fixing device that constitutes an image forming apparatus such as a copying machine or a printer.
  • the infrared temperature sensor detects the temperature of the recording paper without damaging the conveyance roller while rotating the recording paper and the toner carried on the recording paper by the static electricity.
  • This infrared temperature sensor includes an infrared detection element and a temperature compensation element, detects the infrared radiation heat amount of the roller as the detection object by the infrared detection element, and further compensates for the temperature by detecting the ambient temperature with the temperature compensation element. , Identify the temperature of the roller.
  • the infrared detection element and the temperature compensation element are supported by the heat conversion film.
  • the heat conversion film converts the energy possessed by the infrared light into heat when the infrared light is irradiated.
  • the infrared temperature sensor Since the temperature of the fuser roller greatly affects the image quality, the infrared temperature sensor is required to accurately detect the temperature.
  • Various measures have been proposed to meet this demand.
  • the infrared temperature sensor of Patent Document 1 the light guide area corresponding to the infrared detection element and the light shielding area corresponding to the temperature compensation element are in a substantially symmetrical form, and the infrared detection element The thermal energy received by the temperature compensation element can be made equal.
  • the infrared temperature sensor of patent document 1 can temperature correctly by detecting only the thermal energy by irradiation of infrared rays correctly.
  • the heat conversion film supporting the infrared detection element and the temperature compensation element swells and deforms during detection of temperature, thereby changing the amount of incident infrared light and the amount of heat radiated from the heat conversion film.
  • an object of this invention is to provide the infrared temperature sensor which can detect temperature with higher precision by adding the element which is not considered in the conventional infrared temperature sensor.
  • the present invention relates to an infrared temperature sensor that detects the temperature of an object to be detected in a noncontact manner in accordance with infrared rays emitted from the object to be detected.
  • the infrared temperature sensor according to the present invention is irradiated with infrared radiation emitted from the detection target, a heat conversion film for converting the emitted infrared radiation into heat, and the heat conversion film disposed opposite to the heat conversion film, and emitted from the detection target
  • a light shielding area for blocking irradiation of infrared light to a part of the heat conversion film, an infrared detection element held in an area on the heat conversion film to be irradiated with infrared light emitted from the detection object, and a light shielding area
  • the present inventors examined factors that cause deviation in the temperature detected by the infrared temperature sensor. For example, in the case of an image forming apparatus, for example, convection generated in the apparatus and a cooling fan provided in the apparatus It was found that the air flow due to the rotation of the air was one factor of the detected temperature deviation. That is, the air flow enters the inside of the infrared temperature sensor through the light guide area, and the temperature balance inside the sensor becomes unstable, thereby causing a deviation in the detected temperature. Therefore, the infrared temperature sensor according to the present invention shields the air flow from the outside through the light guiding area and transmits the infrared light to the light guiding area.
  • the shield in the present invention includes at least two forms of the first form and the second form. As a premise of two forms, while holding a heat conversion film, it has a case where a light guiding area and a light shielding area are provided.
  • a shield separate from the case is attached to a predetermined position of the case.
  • the case In the second mode, the case is integrally formed of a resin material, and the shield is integral with the case.
  • the shield is made of a film-like material separate from the case that transmits infrared light, and can be provided in a light guide area separated by a predetermined distance from the heat conversion film.
  • the shield is provided at the infrared light entrance of the light guide area.
  • the shield in the present invention may be integrally provided on a molded body that divides the light guiding area and the light shielding area.
  • the first case provided on the front surface side of the heat conversion film and provided with the light guide area and the light shielding area, and the back surface side of the heat conversion film
  • a second case having an element receiving chamber for receiving the infrared detection element and the temperature compensation element on the surface side, and the heat conversion film.
  • the infrared detecting element and the temperature compensating element are held on the back surface side of the heat conversion film and accommodated in the element accommodating chamber.
  • the infrared temperature sensor including the case includes a first air passage communicating between at least one of the light guiding region and the light shielding region and the element accommodating chamber, and a second air passage connecting the light guiding region and the light shielding region. And can be provided.
  • the case in the second embodiment is made of a resin material that transmits infrared light, and a portion corresponding to the light shielding area is subjected to light shielding treatment, or a portion corresponding to the light guiding area is thinner than the light shielding area.
  • a more specific case in the second embodiment is provided on the front surface side of the heat conversion film, and on the back surface side of the heat conversion film, the first case provided with the light guide area and the light shielding area, And a second case having an element receiving chamber for receiving the infrared detection element and the temperature compensation element on the surface side, and the heat conversion film.
  • the shield is integral with the first case.
  • the infrared detecting element and the temperature compensating element are held on the back surface side of the heat conversion film and accommodated in the element accommodating chamber.
  • the infrared temperature sensor including the case includes a first air passage communicating between at least one of the light guiding region and the light shielding region and the element accommodating chamber, and a second air passage connecting the light guiding region and the light shielding region. And.
  • the first air passage in the first embodiment and the second embodiment can be provided in the partition between the light guide area and the light shielding area, or provided between the partition between the light guide area and the light shielding area and the heat conversion film Can. Further, the second air passage can be provided through the front and back of the heat conversion film, or can be provided through the first case and the second case.
  • the case is provided on the front surface side of the heat conversion film, and is provided on the back surface side of the heat conversion film, the first case forming the light guide area and the light shielding area, A light guide area facing the front surface of the heat conversion film and the light shielding, in the case of including a second case having an element receiving chamber for containing the infrared detection element and the temperature compensation element on the surface side with the heat conversion film;
  • the volume of the area and the volume of the element storage chamber facing the back surface of the heat conversion film can be equalized.
  • the first case includes a case base having a front surface and a back surface, a light guide area formed through the front surface and the back surface of the case base, and the case base And a light shielding area formed inside the light shielding dome rising from the side of the front surface.
  • the case is provided on the front surface side of the heat conversion film, and the first case forming the light guide area and the light shielding area, the heat conversion film on the back surface side of the heat conversion film And a flat second case which is provided to be opposed to each other.
  • the sealing is performed such that the boundary portion where the first case and the second case abut against each other is hermetically sealed in order to ensure the internal airtightness. It is preferred to have a structure.
  • the shield can have an optical function.
  • the optical function includes a lens function or a filter function.
  • the infrared temperature sensor of the present invention includes a shield that shields external ventilation through the light guide area and transmits infrared light to the light guide area.
  • the infrared temperature sensor of the present invention receives the convection generated in the device and the air flow due to the rotation of the cooling fan provided in the device entering the inside of the infrared temperature sensor through the light guiding area, It is possible to prevent the temperature balance from becoming unstable.
  • the infrared temperature sensor which concerns on 1st Embodiment of this invention is shown, (a) is a front view, (b) is a top view, (c) is a side view.
  • the infrared temperature sensor which concerns on 1st Embodiment is shown, (a) is II (a)-II (a) line arrow sectional view of FIG. 1, (b) is II (b)-II (b) of FIG. FIG.
  • FIG. 3 is a cross-sectional view corresponding to FIG. 2A, showing an infrared temperature sensor according to a second embodiment of the present invention.
  • the infrared temperature sensor which concerns on 2nd Embodiment is shown, (a) is a front view, (b) is a top view, (c) is a side view.
  • the infrared temperature sensor which concerns on 2nd Embodiment is shown, (a) is a V (a)-V (a) line arrow sectional view of FIG. 1, (b) is a top view of an infrared rays absorption molded object, (c) is. Is a side view of the infrared ray absorption molded article.
  • the infrared temperature sensor which concerns on 3rd Embodiment of this invention is shown, (a) is a top view, (b) is a side view, (c) is a rear view.
  • FIG. 7 is a diagram showing another embodiment included in the present invention.
  • FIG. 6 shows yet another embodiment included in the present invention.
  • the schematic structure of the fixing device concerning this embodiment is shown, (a) is a front view, (b) is a side view.
  • the infrared temperature sensor 1 (hereinafter simply referred to as the temperature sensor 1) includes a first case 20, a second case 30 assembled on the back side of the first case 20, and a first case A heat conversion film 40 held between the second case 20 and the second case 30, and an infrared detection element 43 and a temperature compensation element 45 supported by the heat conversion film 40 are provided.
  • the temperature sensor 1 measures the temperature of the roller 102 as the fixing means of the toner fixing device 101 constituting the image forming apparatus such as a copying machine or a printer, and the infrared rays emitted from the roller 102 as infrared rays.
  • the sensor element 43 detects the temperature
  • the temperature compensation element 45 detects the ambient temperature to compensate for the temperature, thereby detecting the temperature of the roller 102 in a noncontact manner.
  • the toner fixing device 101 includes a roller 102 as a fixing unit and a roller 103 as a pressing unit.
  • the temperature sensor 1 can also detect the temperature of the roller 103 as a pressure unit.
  • the side facing the detection target is defined as the front side.
  • the temperature sensor 1 of the present embodiment is characterized in that it has a configuration to prevent the accuracy of the detected temperature from being lowered even when receiving the air flow.
  • the first case 20 has a base 21 having a rectangular planar shape, and a body having a rectangular parallelepiped outer shape that protrudes from the base 21 toward the front surface side. 22 and.
  • the first case 20 is integrally formed with a base portion 21 and a body portion 22 of a metal material having high thermal conductivity, such as aluminum and copper.
  • a high thermal conductivity metal material is a desirable form, the present invention is not limited thereto.
  • the second case 30 is not limited thereto. The same applies to the second case 30.
  • the body 22 includes a side wall 23 rising from the base 21 and an upper wall 24 provided at the tip of the side wall 23, and a cavity 25 is formed therein.
  • the cavity 25 is substantially in the shape of a rectangular parallelepiped similar to the body 22.
  • the cavity 25 penetrates the back surface side of the first case 20 (base 21).
  • the cavity 25 penetrates the upper wall 24 through the infrared incident port 29 partially opened in a rectangular shape on the upper wall 24 on the front surface side, but the portion other than the infrared incident port 29 is the upper wall 24 Closed by Also, the cavity 25 is divided into two regions by the partition 26 hanging down from the upper wall 24.
  • One space area constitutes the light guiding area 27 and the other space area constitutes the light shielding area 28.
  • the light guiding area 27 allows the incident infrared light to pass to the heat conversion film 40.
  • the light shielding area 28 prevents the heat conversion film 40 from being irradiated with the infrared light irradiated to the upper wall 24 and the infrared light incident to the light guide area 27.
  • the partitions 26 prevent the infrared light incident on the light guide area 27 from being irradiated to the heat conversion film 40.
  • a minute gap is provided between the tip of the partition 26 and the heat conversion film 40, and this gap constitutes the second air passage 48.
  • the light guiding area 27 and the light shielding area 28 are substantially symmetrical with respect to the partition 26.
  • the form of an object here means that the shape and the dimension which planarly viewed each of the light guide area
  • the first case 20 includes a shield 60 that seals the infrared incident port 29.
  • the shield 60 corresponds to the first embodiment described above.
  • the shield 60 is a film-like member that transmits infrared rays but blocks air flow, and may use a solid material with high infrared transmittance.
  • resin materials such as PPS (Poly Phenylene Sulfide: polyphenylene sulfide resin), PTFE (polytetrafluoroethylene), etc. can be used, but single crystal materials such as Si single crystal and Ge single crystal can also be shielded It can be used as the body 60.
  • the shield 60 may be made of a material that transmits infrared light of a specific wavelength. Also, the shield 60 may constitute a lens.
  • the means for fixing the shield 60 to the tip of the first case 20 is optional, and may be fixed by an adhesive or a pressure-sensitive adhesive, or may be fixed by welding.
  • the shield 60 may have a shape and a size that can seal the infrared ray inlet 29, and may have a shape and a size that covers the periphery of the infrared ray inlet 29 as in the present embodiment, for example. It may have a shape and dimensions that cover the entire area. As described above, the configuration in which the shield 60 is provided on the upper wall 24 so as to cover the infrared ray entrance 29 makes it easy to attach the shield 60.
  • the second case 30 includes a base 31 having a rectangular planar shape, and an element housing portion 32 projecting from the base 31 toward the back surface side.
  • the base 31 is formed in substantially the same shape and size as the base 21 of the first case 20.
  • the first case 20 and the second case 30 are positioned such that the base 21 and the base 31 have the same peripheral edges, and are joined airtightly with the heat conversion film 40 interposed therebetween.
  • the first case 20 and the second case 30 are joined, for example, by caulking.
  • the first case 20 and the second case 30 can be airtightly joined also by caulking, but it is preferable to have a structure that seals the boundary part by filling the resin material in the boundary part of the base 21 and the base 31.
  • An adhesive can also be used as this resin material.
  • an element housing chamber 33 opened to the front surface side is formed in the element housing portion 32.
  • the infrared detection element 43 and the temperature compensation element 45 supported by the heat conversion film 40 are disposed facing the element storage chamber 33. Direct contact between the infrared detection element 43 and the temperature compensation element 45 with the bottom floor 34 of the element housing portion 32 is avoided by the presence of the element housing chamber 33. That is, the air contained in the element accommodation chamber 33 plays a role of a heat insulating layer, and minimizes the thermal influence from the outside to the infrared detection element 43 and the temperature compensation element 45, particularly from the rear surface side of the temperature sensor 1.
  • the present invention although it is a desirable form to provide a thermal insulation layer by air, the form in which the infrared detection element 43 and the temperature compensation element 45 are in direct contact with the second case 30 is not excluded.
  • the heat conversion film 40 converts the energy of the infrared light into heat when the infrared light is irradiated, and the converted heat is transmitted to the infrared detection element 43, whereby the temperature is detected by the infrared detection element 43.
  • the heat conversion film 40 holds the infrared detection element 43 and the temperature compensation element 45.
  • the infrared detection element 43 and the temperature compensation element 45 are electrically connected to a wiring pattern (not shown).
  • the infrared detection element 43 and the temperature compensation element 45 receive the element of the second case 30, as shown in FIG. It is arranged inside the chamber 33.
  • the infrared detection element 43 and the temperature compensation element 45 are disposed in line-symmetrical positions with respect to the partition 26 which is the center in the width direction W.
  • the heat conversion film 40 is formed of a resin made of a polymer material.
  • the material of the resin is not limited as long as the material absorbs infrared rays, and known resins such as PPS (polyphenylene sulfide), polyimide, polyester, polyethylene and the like can be used. Moreover, if it is a material which absorbs infrared rays, materials other than resin can also be used.
  • the heat conversion film 40 has an arbitrary thickness, but can improve the infrared absorptivity, and wrinkles are formed during the operation to be held between the first case 20 and the second case 30. In view of preventing, it is preferable to make the thickness about 5 to 50 ⁇ m.
  • first air passages 47, 47 penetrating the front and back are provided in the area corresponding to the light guide area 27 and the area corresponding to the light shielding area 28, respectively.
  • the light guiding area 27 and the light shielding area 28 communicate with the element accommodation chamber 33 through the first air passages 47 and 47 to allow air flow between the two.
  • the infrared detection element 43 detects a temperature rise due to heat generated by the heat conversion film 40 absorbing the infrared ray radiated from the surface of the roller 102 which is the detection target, and the temperature compensation element 45 detects an ambient temperature.
  • a small-sized resistor having a temperature coefficient such as a thin film thermistor or a platinum temperature sensor can be widely used.
  • the heat effect of “heat conduction” + “convection” + “reradiation” in the infrared detection element 43 is the same as the heat effect of “heat conduction” + “convection” + “reradiation” by the temperature compensation element 45 That is the premise. Therefore, it is desirable to equalize the thermal effects of heat conduction, convection and re-radiation in the infrared detection element 43 and the temperature compensation element 45.
  • the infrared detection element 43 and the temperature compensation element 45 are preferably arranged in line symmetry with respect to the partition 26.
  • the first case 20 and the second case 30 are positioned such that the base 21 and the base 31 have the same peripheral edges, and are airtightly joined via the heat conversion film 40 Be done.
  • the inside of the first case 20 and the second case 30 is sealed from the outside by this joint portion, and the flow of air between the inside and the outside is blocked.
  • the infrared detection element 43 is disposed substantially at the center of the light guide region 27 in plan view. Are disposed substantially at the center of the light shielding area 28. Moreover, the light guiding area 27 and the light shielding area 28 form a substantially symmetrical form. Therefore, the heat influence which the infrared detection element 43 and the temperature compensation element 45 receive can be made substantially equal except the irradiation of the infrared rays from the roller 102.
  • the temperature sensor 1 is disposed so that the front surface side of the first case 20 faces the roller 102 which is a detection target.
  • the infrared radiation emitted from the roller 102 is applied to the first case 20 of the temperature sensor 1 in particular, but the infrared radiation applied to the area corresponding to the infrared incident port 29 passes through the shield 60 and is transmitted to the light guide area 27 After entering and passing through the light guide area 27, the area of the heat conversion film 40 corresponding to the light guide area 27 is irradiated.
  • the infrared rays entering the light guide area 27 can not enter the light shielding area 28 because they are blocked by the partition 26.
  • the infrared rays irradiated to the upper wall 24 of the first case 20 can not pass through the upper wall 24, the infrared rays do not enter the light shielding area 28.
  • the temperature compensation element 45 has the ambient temperature Detect only Therefore, by taking the difference between the detection temperature of the infrared detection element 43 and the detection temperature of the temperature compensation element 45, it is possible to accurately detect only the thermal energy by the irradiation of the infrared light.
  • the temperature sensor 1 has the infrared ray inlet 29 facing the front side sealed by the shield 60, under the environment where disturbance due to the air flow F due to the air flow and convection by the fan occurs inside the image forming apparatus It is possible to prevent the air flow F from entering the light guide area 27 from the infrared entrance 29 even if it is placed in the Moreover, in the temperature sensor 1, the light guiding area 27, the light shielding area 28 and the element accommodation chamber 33 are kept airtight with respect to the outside of the temperature sensor 1, so the light guiding area 27, the light shielding area 28 and the element accommodation room 33 Also, the air flow F does not enter. Therefore, according to the temperature sensor 1, it can suppress that the temperature inside the temperature sensor 1 becomes non-uniform
  • the inside of the temperature sensor 1 including the light guide region 27 airtight, the influence of disturbance can be suppressed.
  • the airtight structure by adopting the airtight structure, the amount of expansion of air in the light guide area 27 and the light shielding area 28 located on the front surface side with respect to the heat conversion film 40 and the element storage chamber 33 located on the surface side. There may be differences in the amount of air expansion.
  • the heat conversion film 40 is deformed from the initial flat form to a curved form, which may cause an error of the detected temperature. The following more specifically describes.
  • the temperature sensor 110 shown in FIG. 3B has a combined volume of the light guide region 27 facing the front surface of the heat conversion film 40 and the light shielding region 28 as V11, and an element storage chamber facing the back surface of the heat conversion film 40.
  • the volumes V11 and V12 are values at the normal temperature T1, and the heat conversion film 40 at the normal temperature T1 is flat.
  • the temperature sensor 110 of FIG. 3B does not include the first air passages 47, 47.
  • the total volume of the light guide area 27 and the light shielding area 28 when the entire temperature sensor 110 which has been the normal temperature T1 is heated to a uniform temperature T2 is V21, and the volume of the element accommodation chamber 33 is V22. Since the increase in volume of volume V21 with respect to volume V11 is larger than the increase in volume of volume V22 with respect to volume V12 according to Charles's law, as shown in FIG. To bend.
  • the temperature sensor 1 includes the first air passage 47 in the heat conversion film 40. Therefore, even if the volume V11 is larger than the volume V12, the light guide area 27 and the light shielding The pressure in the three spaces of the region 28 and the element storage chamber 33 can be equalized. Thereby, the deformation of the heat conversion film 40 can be prevented.
  • the light guiding area 27 and the light shielding area 28 are not joined between the tip of the partition 26 and the heat conversion film 40, and a second air passage 48 having a minute gap is provided. Air can be circulated in the three spaces of the light guide area 27, the light shielding area 28, and the element accommodation chamber 33 by the second air passage 48 and the first air passage 47.
  • the temperature sensor 1 can eliminate the influence of the disturbance by the shield 60 and equalize the pressure in three spaces of the light guide area 27, the light shielding area 28 and the element accommodation chamber 33, the disturbance is The temperature under the resulting environment can be detected more accurately.
  • an infrared temperature sensor 2 according to a second embodiment of the present invention will be described with reference to FIG.
  • the infrared temperature sensor 2 has the same basic configuration as the temperature sensor 1, but the specific solution means for preventing the heat conversion film 40 from being curved is different from the temperature sensor 1. Therefore, hereinafter, the infrared temperature sensor 2 will be described focusing on the difference from the temperature sensor 1.
  • the components of the infrared temperature sensor 2 that are the same as the temperature sensor 1 are given the same reference numerals as the temperature sensor 1 in the drawings, and the description thereof may be omitted.
  • the infrared temperature sensor 2 does not have the first air passages 47, 47. However, the infrared temperature sensor 2 is manufactured such that the volume V11 of the light guide area 27 and the light shield area 28 is equal to the volume V12 of the element accommodation chamber 33. Therefore, even if the infrared temperature sensor 2 is warmed up to the temperature T2, the volume V21 and the volume V22 are also equal, so that the curvature of the heat conversion film 40 can be prevented.
  • an infrared temperature sensor 3 according to a third embodiment of the present invention will be described with reference to FIGS. 5 and 6.
  • the infrared temperature sensor 3 also has the same basic configuration as the temperature sensor 1, but differs in the specific solution to the air flow generated by the convection and fan rotation generated in the apparatus.
  • the components of the infrared temperature sensor 3 that are the same as the temperature sensor 1 are given the same reference numerals as the temperature sensor 1 in the drawings, and the description thereof may be omitted.
  • the infrared temperature sensor 3 includes a compartment molding 50.
  • the sectioned molded body 50 has a rectangular parallelepiped outer shape, and is provided with a side wall 51 forming an outer periphery. Further, the sectioned body 50 is provided with a first air gap 53 and a second space 54 which are surrounded by the side wall 51 and which are divided by the section wall 52.
  • the first air gap 53 and the second air gap 54 penetrate in the height direction (the front-rear direction in the state of being disposed in the trunk portion 22), and have a substantially symmetrical form with reference to the partition wall 52.
  • a portion corresponding to the first air gap 53 protrudes more forward than a portion corresponding to the second air gap 54.
  • the sectioned body 50 includes the shield 60 in the region corresponding to the first air gap 53.
  • the shield 60 may be formed integrally with the sectioned body 50 or may be assembled to the position of the sectioned body 50 after being formed separately from the sectioned body 50. In any case, the shield 60 is structurally integral with the compartment molding 50.
  • the divided molded body 50 having the above configuration is mounted inside the body 22 of the first case 20.
  • the divided molded body 50 is disposed on the side of the region where the first air gap 53 penetrates the upper wall 24 through the infrared incident port 29 inside the body 22, and the second air gap 54 is located on the upper wall inside the body 22. It is arranged on the side closed by 24.
  • the first air gap 53 is disposed on the side corresponding to the infrared detection element 43
  • the second void is disposed on the side corresponding to the temperature compensation element 45.
  • the first air gap 53 constitutes a light guiding area 27 through which the infrared ray incident from the infrared ray entrance 29 reaches the heat conversion film 40.
  • the second air gap 54 constitutes a light shielding area 28 in which the irradiation of the infrared light is blocked by being surrounded by the side wall 51, the dividing wall 52, the upper wall 24 and the heat conversion film 40. Since the first air gap 53 and the second air gap 54 are substantially symmetrical as described above, the light guide area 27 and the light shielding area 28 are also substantially symmetrical.
  • the infrared detection element 43 is disposed substantially at the center of the light guide area 27 in plan view, and the temperature compensation element 45 is a light shielding area It is located approximately at the center of 28. Therefore, in the infrared temperature sensor 3 as well, the thermal effects received by the infrared detection element 43 and the temperature compensation element 45 can be equalized except for the irradiation of the infrared light from the roller 103.
  • the heat conversion film 40 in which the infrared detection element 43 and the temperature compensation element 45 are arranged, and the second case 30 are provided with a predetermined distance so that the thermal effects due to heat conduction, convection and infrared re-radiation become the same. Arranged in parallel.
  • the section molded body 50 is made of a resin material. If this resin material is formed of a resin material having a high infrared absorptivity, the infrared light reflected from the inner wall surface of the body 22 and the heated body 22 can be provided by arranging the resin material on the body 22 of the first case 20. It is possible to avoid or suppress the influence of the emitted infrared light from affecting the infrared detection element 43 and the temperature compensation element 45.
  • the infrared temperature sensor 3 Since the infrared temperature sensor 3 is provided with the shield 60, the influence of disturbance can be eliminated. Further, the infrared temperature sensor 3 is provided with the first air passage 47 in the heat conversion film 40 similarly to the temperature sensor 1, and the pressure of three spaces of the light guide area 27, the light shield area 28 and the element accommodation chamber 33 is Since it can be equal, the temperature under the environment where the disturbance occurs can be detected more accurately. Further, the infrared temperature sensor 3 has the compartment molded body 50 and the shield 60 integrated, so that the shield 60 can be mounted at a desired position only by assembling the compartment molded body 50.
  • an infrared temperature sensor 4 is manufactured for the purpose of downsizing as compared with the temperature sensors 1 to 3.
  • the first case 120 and the second case 130 are both formed by sheet metal processing. As shown in FIG. 7, the first case 120 is provided adjacent to the light shielding dome 122 protruding from the front surface 211 of the case base 121 and the light shielding dome 122 in the width direction W, and has an opening shape in plan view And a rectangular infrared incident port 129.
  • the light shielding dome 122 has an outer shell formed in the shape of a square frustum.
  • the light shielding dome 122 includes a side wall 123 rising obliquely from the case base 121 and an upper wall 124 connecting the tip of the side wall 123.
  • the light shielding dome 122 has a light shielding area 128 formed by the air gap in the shape of a quadrangular pyramid inside thereof.
  • the light shielding area 128 is a rectangular truncated pyramidal space, so the shape in plan view is rectangular and tapers from the side of the back surface 212 to the upper wall 124, that is, the tip.
  • the infrared incident port 129 is formed in the front surface 211 of the case base 121.
  • the case base 121 is provided with a light guide area 127 connected to the infrared incident port 129 by the penetration from the infrared incident port 129 which is the opening of the front surface 211 to the back surface 212.
  • the infrared incident port 129 and the light guiding area 127 have a rectangular shape in plan view, but have a shape similar to the shape in plan view of the light shielding area 128 of the light shielding dome 122.
  • the infrared incident port 129 and the light guiding area 127 and the light shielding dome 122 are such that one sides of each other face each other, and the centers in the longitudinal direction L of each other. Are arranged at small intervals in the width direction W so as to coincide with each other.
  • the bottom of the side wall 123 functions as a partition 152 that divides the light guiding area 127 and the light shielding area 128.
  • the tip of the partition 152 which is the lower end in the figure is provided with a minute gap with the heat conversion film 40.
  • a case base 121 and a light guiding area 127 including the light shielding dome 122 and the infrared incident port 129 are integrally formed of, for example, a metal material having high thermal conductivity such as aluminum and copper.
  • the second case 130 is similar.
  • the light shielding area 128 and the light guiding area 127 are formed to have the same volume.
  • the second case 130 includes a cover base 131 having a rectangular shape in a plan view, and an element housing dome 132 projecting from the back surface 212 of the cover base 131. And.
  • the air gap inside the quadrangular frustum shape of the element accommodating dome 132 forms an element accommodating chamber 133. Further, as shown in FIG. 8, in the element housing dome 132, the infrared detection element 43 and the temperature compensation element 45 held by the heat conversion film 40 are disposed inside the element housing chamber 133.
  • the infrared temperature sensor 4 has the infrared incident port 129 sealed by the shield 60, and as with the temperature sensors 1 to 3, since the shield 60 is provided, the influence of disturbance can be eliminated. Moreover, the infrared temperature sensor 4 is equipped with the 1st ventilation path 47 in the heat conversion film 40 similarly to the temperature sensor 1, and the front-end of the partition 152 is provided with the heat conversion film 40 and the micro space
  • the first to fourth embodiments show an example in which the shield 60 is provided at the tip of the light guide area 27 separated from the heat conversion film 40
  • the present invention is not limited to this.
  • the present invention is, for example, as shown in FIG. 9A, at a position separated from the tip of the light guide area 27 and at a predetermined distance from the heat conversion film 40, the shield 60 inside the light guide area 27. Can be provided, and also in this embodiment, the influence of disturbance can be suppressed.
  • the first to fourth embodiments show an example in which the first air passages 47, 47 corresponding to the light guiding area 27 and the light shielding area 28 of the heat conversion film 40 are provided, the present invention is not limited thereto. Not limited to. In the present invention, for example, as shown in FIG. 9 (b), the first air passage 47 may be provided only at the position corresponding to the light shielding area. Also in this embodiment, the pressure in the three spaces of the light guiding area 27, the light shielding area 28, and the element accommodation chamber 33 can be equalized.
  • first to fourth embodiments show an example in which the first air passage 47 is provided in the heat conversion film 40
  • the present invention is not limited to this.
  • the first air passage 47 may be provided not through the heat conversion film 40 but through the first case 120 and the second case 30.
  • the pressure in the three spaces of the light area 27, the light shielding area 28 and the element accommodation chamber 33 can be equalized.
  • the second air passage 48 can be provided so as to penetrate the front and back of the partition 26 instead of between the partition 26 and the heat conversion film 40.
  • the 1st Embodiment-4th Embodiment showed the example which forms the element storage chamber 33 by providing 2nd case 30 and 130 in the back surface side of the heat conversion film 40
  • this invention is limited to this. Absent.
  • the infrared detection element 43 and the temperature compensation element 45 are provided on the front surface side of the heat conversion film 40.
  • the heat conversion film 40 is formed by providing the flat metal back plate 35 opposite to the back surface side of the heat conversion film 40. It may be supported by the case 120 and the back plate 35. Since the back plate 35 is in contact with the heat conversion film 40, it can prevent the heat conversion film 40 from bending. In addition, the back plate 35 prevents the heat conversion efficiency from being lowered by the infrared light being transmitted through the heat conversion film 40 and being emitted to the outside.
  • first to fourth embodiments show an example of the first embodiment in which the shield 60 prepared separately from the first case 20 is attached to a predetermined position of the first case 20, the present invention is not limited thereto. Not limited to.
  • the second embodiment in which the shield 60 is integral with the first case 20 can be applied.
  • the first case 20 is integrally formed of a resin material that can transmit infrared light, including the shield 60.
  • the second case 30 may be made of a metal material or a resin material.
  • the infrared ray impermeable film 61 is made of a material that blocks the transmission of infrared light or a material that reflects infrared light except for the portion corresponding to the infrared incident port 29.
  • the side wall 23 and the upper wall 24 Provided on the side wall 23 and the upper wall 24.
  • thick lines indicate the infrared ray impermeable film 61.
  • the material for blocking the transmission of infrared radiation can be appropriately selected from metals, resins, ceramics and the like.
  • the light guiding area 27 and the light shielding area 28 can be secured also by changing the thickness of the upper wall 24 in addition to the infrared ray impermeable film 61. That is, although the transmission of infrared rays is permitted by reducing the thickness of the portion corresponding to the light guide area 27 of the upper wall 24, the thickness of the portion corresponding to the light shield area 28 of the upper wall 24 and the other side wall 23 By increasing the thickness, transmission of infrared light can be prevented.
  • the shield 60 can have an optical function.
  • the optical functions include a first function as a lens and a second function as an optical filter.
  • a Fresnel lens can be adopted as a specific example of the first function.
  • the Fresnel lens has a plurality of concentric grooves cut on one surface of the front and back, and the other surface is flat. If the formation surface of the concentric groove is disposed on the side facing the infrared detection element 43 and the flat surface is disposed on the side facing the roller 102 as a heat source, the infrared rays pass through the light guiding area 27 as parallel light flux The heat conversion film is irradiated. As a result, it is possible to suppress the absorption of the infrared light incident on the light guide area 27 from the inner surface of the side wall 23, so that the temperature can be detected with high accuracy.
  • a concave lens or a convex lens can be adopted as a specific example of the first function. Then, only the infrared light of a specific wavelength range outside the infrared temperature sensor can be guided to the light guide area 27. As a result, by appropriately setting the lens specifications and the distance from the roller 102 and the conditions such as the angle, it is possible to selectively guide the infrared light due to the roller 102 as a heat source to the light guiding area 27, high accuracy Can detect the temperature.
  • the second function is to transmit infrared but block transmission of visible light. Furthermore, the second function transmits only a specific wavelength range in the infrared, while blocking the transmission of infrared rays of wavelengths other than that wavelength range. Thereby, only the infrared rays of the wavelength of the area to be detected can be irradiated to the heat conversion film 40 through the light guide area 27. Therefore, by appropriately selecting the wavelength range, the infrared rays caused by the roller 102 as the heat source are selectively guided to the heat conversion film 40, so that the temperature can be detected with high accuracy.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiation Pyrometers (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

L'invention concerne un capteur de température à infrarouge comprenant : un film de conversion de chaleur 40 qui convertit des rayons infrarouges émis en chaleur ; une région de blocage de lumière 28 qui est disposée à l'opposé du film de conversion de chaleur 40, et qui empêche une partie du film de conversion de chaleur 40 d'être irradiée avec les rayons infrarouges émis par l'objet à détecter ; un élément de détection infrarouge 43 retenu dans une région sur le film de conversion de chaleur irradiée par les rayons infrarouges ; un élément de compensation de température 45 qui est retenu dans une région sur le film de conversion de chaleur où les rayons infrarouges sont bloqués par la région de blocage de lumière ; une région de guidage de lumière 27 qui guide les rayons infrarouges émis par l'objet à détecter vers une région où l'élément de détection infrarouge 43 est disposé ; et un corps de blindage 60 qui empêche l'air de pénétrer depuis l'extérieur par l'intermédiaire de la région de guidage de lumière 27 et permet aux rayons infrarouges de passer à travers la région de guidage de lumière.
PCT/JP2017/032735 2017-09-12 2017-09-12 Capteur de température à infrarouge WO2019053759A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2017/032735 WO2019053759A1 (fr) 2017-09-12 2017-09-12 Capteur de température à infrarouge
JP2019518329A JP6892500B2 (ja) 2017-09-12 2017-09-12 赤外線温度センサ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/032735 WO2019053759A1 (fr) 2017-09-12 2017-09-12 Capteur de température à infrarouge

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WO2019053759A1 true WO2019053759A1 (fr) 2019-03-21

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187128A (ja) * 1987-01-30 1988-08-02 Daikin Ind Ltd 輻射温度測定装置
JPH06273233A (ja) * 1993-03-23 1994-09-30 Toshiba Corp 輻射熱センサ
JPH08128896A (ja) * 1994-10-30 1996-05-21 Horiba Ltd 焦電型赤外線検出器
JP2534874Y2 (ja) * 1991-04-22 1997-05-07 石塚電子株式会社 非接触形温度検出器
JP2001228742A (ja) * 2000-02-15 2001-08-24 Ricoh Co Ltd 画像形成装置及び定着装置及びその温度制御方法
JP2008020384A (ja) * 2006-07-14 2008-01-31 Osaka Gas Co Ltd 放射温度測定装置
JP2008111849A (ja) * 1997-09-29 2008-05-15 Ishizuka Electronics Corp 非接触温度センサ
JP2014149300A (ja) * 2014-03-28 2014-08-21 Tdk Corp 温度センサ
WO2015020081A1 (fr) * 2013-08-09 2015-02-12 Ｓｅｍｉｔｅｃ株式会社 Capteur de température infrarouge et dispositif utilisant ledit capteur de température infrarouge
WO2016152221A1 (fr) * 2015-03-25 2016-09-29 Ｓｅｍｉｔｅｃ株式会社 Capteur de température infrarouge et dispositif doté dudit capteur de température infrarouge
WO2016152220A1 (fr) * 2015-03-25 2016-09-29 Ｓｅｍｉｔｅｃ株式会社 Capteur de température infrarouge, carte de circuits imprimés, et dispositif utilisant ledit capteur de température infrarouge
JP2016217781A (ja) * 2015-05-15 2016-12-22 京セラドキュメントソリューションズ株式会社 温度検知装置、定着装置及び画像形成装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3805039B2 (ja) * 1996-11-14 2006-08-02 シチズン時計株式会社 放射体温計
US7718967B2 (en) * 2005-01-26 2010-05-18 Analog Devices, Inc. Die temperature sensors

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187128A (ja) * 1987-01-30 1988-08-02 Daikin Ind Ltd 輻射温度測定装置
JP2534874Y2 (ja) * 1991-04-22 1997-05-07 石塚電子株式会社 非接触形温度検出器
JPH06273233A (ja) * 1993-03-23 1994-09-30 Toshiba Corp 輻射熱センサ
JPH08128896A (ja) * 1994-10-30 1996-05-21 Horiba Ltd 焦電型赤外線検出器
JP2008111849A (ja) * 1997-09-29 2008-05-15 Ishizuka Electronics Corp 非接触温度センサ
JP2001228742A (ja) * 2000-02-15 2001-08-24 Ricoh Co Ltd 画像形成装置及び定着装置及びその温度制御方法
JP2008020384A (ja) * 2006-07-14 2008-01-31 Osaka Gas Co Ltd 放射温度測定装置
WO2015020081A1 (fr) * 2013-08-09 2015-02-12 Ｓｅｍｉｔｅｃ株式会社 Capteur de température infrarouge et dispositif utilisant ledit capteur de température infrarouge
JP2014149300A (ja) * 2014-03-28 2014-08-21 Tdk Corp 温度センサ
WO2016152221A1 (fr) * 2015-03-25 2016-09-29 Ｓｅｍｉｔｅｃ株式会社 Capteur de température infrarouge et dispositif doté dudit capteur de température infrarouge
WO2016152220A1 (fr) * 2015-03-25 2016-09-29 Ｓｅｍｉｔｅｃ株式会社 Capteur de température infrarouge, carte de circuits imprimés, et dispositif utilisant ledit capteur de température infrarouge
JP2016217781A (ja) * 2015-05-15 2016-12-22 京セラドキュメントソリューションズ株式会社 温度検知装置、定着装置及び画像形成装置

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