KR20170052294A - Temperature sensor with thermopile - Google Patents

Temperature sensor with thermopile Download PDF

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Publication number
KR20170052294A
KR20170052294A KR1020150154579A KR20150154579A KR20170052294A KR 20170052294 A KR20170052294 A KR 20170052294A KR 1020150154579 A KR1020150154579 A KR 1020150154579A KR 20150154579 A KR20150154579 A KR 20150154579A KR 20170052294 A KR20170052294 A KR 20170052294A
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KR
South Korea
Prior art keywords
thermopile
coating layer
sensor
infrared
substrate
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KR1020150154579A
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Korean (ko)
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KR101737400B1 (en
Inventor
김대현
이우원
백대선
김성용
Original Assignee
싸니코전자 주식회사
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Priority to KR1020150154579A priority Critical patent/KR101737400B1/en
Publication of KR20170052294A publication Critical patent/KR20170052294A/en
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Publication of KR101737400B1 publication Critical patent/KR101737400B1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/021Probe covers for thermometers, e.g. tympanic thermometers; Containers for probe covers; Disposable probes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C09D127/18Homopolymers or copolymers of tetrafluoroethene
    • C09D7/12
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0003Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
    • G01J5/0011Ear thermometers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/04Casings
    • G01J5/048Protective parts
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02Constructional details
    • G01J5/08Optical arrangements
    • G01J5/0803Arrangements for time-dependent attenuation of radiation signals
    • G01J5/0862
    • G01K13/004

Abstract

The present invention relates to a thermopile temperature sensor. a PCB board; a thermopile provided on a part of an upper surface of the substrate; a lead-out IC provided on the part of the upper surface of the substrate; and a sensor cap having a covering structure to form a space in the substrate and the upper part of the substrate and having a light receiving hole at a position corresponding to an upper part of the thermopile, wherein a coating layer for radiating heat on an inner surface or an outer surface of the sensor cap. Therefore, the thermopile temperature sensor can improve performance and reliability thereof and can increase stability and durability thereof by offering a simple and easy structure with a low unit cost.

Description

[0001] TEMPERATURE SENSOR WITH THERMOPILE [0002]

The present invention relates to a temperature sensor, and more particularly, to a thermopile temperature sensor capable of improving the performance and reliability of the temperature sensor.

Generally, two methods for measuring temperature can be classified into contact type and non-contact type. The contact type thermometer includes a mercury thermometer, an alcohol thermometer, an NTC thermometer, and a thermocouple and a platinum side thermometer for industrial use. In order to measure the temperature quickly, (Thermopile) thermometer is used.

In the case of a thermopile, it has recently been widely used as a temperature sensor element such as an ear thermometer instead of a mercury thermometer. Due to the precise measurement of the temperature, quick response speed and advantage of being able to measure without directly touching a heat source, The application range is rapidly expanding to various fields such as temperature measurement and temperature measurement of household appliances.

Referring to FIG. 1, a conventional temperature sensing apparatus using infrared rays will be described below. A temperature sensing device using infrared rays is composed of a sensor 5, a reflector 3 and an infrared filter 1. In detail, the sensor 5 senses infrared rays generated by the touch sensing object and converts the infrared rays into an electrical signal. At the upper portion of the sensor 5, infrared rays having a predetermined curvature A reflecting mirror 3 is provided. An infrared ray filter 1 for passing only infrared rays among various kinds of electromagnetic waves is installed on the entrance side of the reflector 3.

Here, the sensor 5 includes a black body that is heated by infrared rays, and a thermopile that generates heat by the heat of the black body. Since the electrical signal from the sensor 5 is very fine, the sensor 5 is usually connected to the signal processing unit 10 for amplifying the electrical signal. That is, the temperature of the surface of the object to be sensed is measured by the output signal of the signal processing unit 10.

When a thermopile sensor having such a structure focuses infrared light irradiated from the outside to a light receiving hole and transmits the thermopile as a thermopile, the thermopile converts the infrared light into an electric signal, and the converted electric signal is processed by the MCU to be displayed at a digital temperature .

An infrared temperature sensor element containing a thermo file is manufactured by forming a thin film of a thermocouple on a silicon wafer. Therefore, in order to improve the sensitivity of the thermopile, it is necessary to absorb the incident infrared radiation energy as much as possible and to prevent the absorbed energy from being lost.

In addition, for more accurate temperature measurement, it is essential to accurately compensate the temperature of the cold junction. However, in the case of the conventional thermopile temperature sensor, the infrared rays incident from the outside are brought into contact with the silicon wafer as well as the on-contact region, thereby raising the temperature of the silicon wafer, and the heat of the silicon wafer due to the infrared radiation is copied to the on- The temperature of the liquid is mistakenly recognized as a temperature higher than the pure temperature of the liquid.

That is, the conventional thermopile sensor affects the thermopile due to external heat and heat inside the sensor cap, which is generated through the PCB substrate, thereby deteriorating the reliability of the temperature sensor.

Korean Registered Patent No. 10-0359836 (Registered Date: October 23, 2002) Korean Registered Patent No. 10-0769587 (Registered Date: October 17, 2007)

The thermopile temperature sensor according to the present invention has the following problems.

First, the present invention provides a thermopile temperature sensor capable of improving the performance of the temperature sensor and improving the reliability.

Second, the present invention provides a thermopile temperature sensor capable of improving stability and durability of a temperature sensor through a simple and easy structure with a low unit price.

The solution of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

According to a first aspect of the present invention, there is provided a semiconductor device comprising: a PCB substrate; A thermopile provided on a part of the upper surface of the substrate; A lead-out IC provided on a part of the upper surface of the substrate; And a cover having a structure covering the substrate and a space formed thereon, the sensor cap having a light receiving hole at a position corresponding to an upper portion of the thermopile, wherein a coating layer for heat radiation is formed on an inner surface or an outer surface of the sensor cap .

Preferably, a coating layer made of an infrared reflective material is formed on the inner surface and the outer surface of the sensor cap. Preferably, the coating layer is made of glass and PTFE (Polytetrafluoroethylene) And a coating layer of an infrared absorbing and shielding material is formed on the outer surface.

Preferably, a lens or an infrared filter is provided under the light receiving hole or the light receiving hole, and the coating layer is made of a mixture of metal and silane and an infrared absorbing and shielding material containing an organic or inorganic compound .

In addition, the coating layer may be formed of a material including a substance group including at least one of phthalocyanine, naphthalocyanine, metal complex, azo dye, anthraquinone, squalic acid derivative, imonium dye, perylene, .

The thermopile temperature sensor according to the present invention has the following effects.

First, the present invention provides a thermopile temperature sensor which can simply improve the performance of the temperature sensor and improve the reliability.

Second, the present invention provides a thermopile temperature sensor capable of efficiently collecting infrared energy and preventing performance degradation due to an external environment.

Third, the present invention provides a high-quality thermopile temperature sensor with high performance and reliability with a simple structure of low cost.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a view showing a structure of a conventional temperature sensing device using infrared rays.
2 is a view showing the structure of a thermopile sensor according to an embodiment of the present invention.
3 is a schematic view showing a coating layer formed on the inner and outer surfaces of the sensor cap of the thermopile temperature sensor according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Wherever possible, the same or similar parts are denoted using the same reference numerals in the drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto.

Means that a particular feature, region, integer, step, operation, element and / or component is specified and that other specific features, regions, integers, steps, operations, elements, components, and / It does not exclude the existence or addition of a group.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

2 is a view showing the structure of a thermopile sensor according to an embodiment of the present invention. As shown in FIG. 2, the thermopile 200 sensor according to the embodiment of the present invention includes a PCB substrate 100; A thermopile (200) provided on a part of the upper surface of the substrate; A lead-out IC 300 installed on a part of the upper surface of the substrate; A cover having a structure covering a space above the PCB substrate 100, the thermopile 200 and the lead-out IC 300, and a light receiving hole 430 formed at a position corresponding to the upper portion of the thermopile 200 And a coating layer 450 and a coating layer 450 for heat radiation are formed on the inner or outer surface of the sensor cap 400.

In order to solve the problem of lowering the reliability of the sensor caused by the external heat of the thermopile sensor 200 and the internal heat generated by the PCB substrate 100 or the like, (200) temperature sensor capable of improving the performance of the device and enhancing the stability and durability by coating with an absorption / blocking material.

That is, the thermopile 200 temperature sensor according to the embodiment of the present invention includes a thermopile 200 and a lead-out IC 300 (Read Out IC) mounted on a main board for mounting various electronic devices, And a light receiving hole 430 is formed in a part of the sensor cap 400 to allow external infrared rays to pass through the sensor cap 400 to be received by the thermopile 200, When the infrared ray passes through the light receiving hole 430 and is transferred to the thermopile 200, the infrared ray is converted into an electric signal by the thermopile 200, and the converted electric signal is outputted by the readout IC 300 at a temperature It is a temperature sensor.

As described above, each constituent element of the thermocouple has a large thermoelectric power, and the thermoelectric power of one thermoelectric material Is composed of a material having a polarity opposite to or greater than the thermoelectric power of the other thermoelectric material.

Here, the thermocouples are located at the intersection of the hot region and the cold region, and the hot junction and the cold junction are thermally isolated. Generally, the cold junction is located on the silicon substrate 110 for efficient heat sinking, and forms a black body 170 that absorbs infrared rays at the contact point.

That is, two different thermoelectric materials are placed in series on a thin diaphragm having a low thermal conductance and a low thermal capacitance, in which the thermopile 200 sensor has a constant infrared radiation The electromotive force which appears when the energy is input is proportional to the temperature difference between the low temperature part and the high temperature part, and it depends on how much the input energy is efficiently absorbed and used.

That is, in the embodiment of the present invention, when the lead-out IC is connected to the thermo-file 200 on the PCB substrate 100 to receive the infrared rays from the thermo-file 200 to generate an electric energy signal, 300 to convert the electrical energy signal into a temperature value for display and output.

 The sensor cap 400 is a cover having a structure for covering a space above the substrate and covers the PCB substrate 100, the thermopile 200 and the lead-out IC 300 to form a space therebetween. And a light receiving hole 430 is formed at a position corresponding to the upper portion of the thermopile 200. The shape of the sensor cap 400 may be a hexahedral shape or a cylindrical shape, but it may be any shape as long as it can receive infrared rays and efficiently measure temperature.

A light receiving hole 430 is formed in a part of the sensor cap 400. It is preferable that the light receiving hole 430 is formed at a position where the supple pile is present vertically downward. This is to receive infrared light most efficiently through the light receiving hole 430 and in the thermopile 200.

The light receiving hole 430 is preferably a hole through which the infrared ray is transmitted and further includes an infrared ray filter for collecting and collecting the infrared ray more efficiently at the position or the lower portion of the light receiving hole 430 and for filtering out electromagnetic waves other than infrared rays . Here, the infrared filter is an element for extracting only a specific infrared ray by transmitting the infrared region and blocking other regions.

2, when the thermopile 200 temperature sensor according to the embodiment of the present invention is provided with the lens 435 or the infrared filter at the lower part of the light receiving hole 430, only the infrared region It is possible to increase the collection efficiency of the thermopiles 200 by focusing the infrared rays.

2, the thermopile 200 temperature sensor according to an embodiment of the present invention includes a sensor cap 400 having a coating layer coated with a coating material of infrared ray blocking / The heat generated by the operation of the PCB substrate 100 or the electronic device is effectively absorbed and blocked so that the infrared rays scattered from the inside can be received by the thermopile 200, The performance of the temperature sensor 200 can be improved and reliability can be improved.

That is, as described above, in addition to efficient collection of input energy by infrared rays, factors affecting the performance of the thermopile 200 sensor due to the heat of the surrounding environment are also very important for improving the performance and reliability of the thermopile 200 thermoregulator Element.

Therefore, in the embodiment of the present invention, in order to block factors affecting the sensitivity and performance of the thermo-file 200 by infrared rays or external heat radiated in addition to the light-receiving hole 430 and heat generated in the PCB substrate 100, And coating layers 450 and 460 for coating infrared rays on the inner and / or outer surfaces of the inner surface and / or the outer surface of the sensor cap 400 are formed, thereby efficiently collecting infrared energy and preventing performance degradation due to the external environment And provides a thermopile (200) temperature sensor.

Here, the coating layer may be made of a mixture of metal and silane and an infrared absorbing and shielding material containing an organic or inorganic compound, or may be a mixture of phthalocyanine, naphthalocyanine, metal complex, azo dye, anthraquinone, Succinic acid derivatives, squalic acid derivatives, imonium dyes, perylene, quaternary and polymethine.

In addition, the coating layer as an infrared reflection or absorption / blocking agent can also be selected from the group consisting of dimethylpoly siloxane polymer, aminoalkylsilane, Mythacrylate silane, organoreactive silane, A material obtained by mixing various silanes such as a hydroxy functional silane and an organic compound or an inorganic compound may be used.

Further, by using a material including a glass material and polytetrafluoroethylene (PTFE), the coating layer can increase the heat radiation characteristic and increase the temperature and electrical stability. Here, polytetrafluoroethylene (PTFE) is a fluororesin which is excellent in chemical resistance and does not change its characteristics at a high temperature (stable at 325 degrees), has good electrical characteristics, is nonflammable and weatherable, The coefficient is also small and has the advantage of being non-toxic.

FIG. 3 is a schematic view showing the coating layers 450 and 460 formed on the inner and outer surfaces of the sensor cap 400 of the temperature sensor 200 according to another embodiment of the present invention. 3, the thermopile 200 temperature sensor according to the embodiment of the present invention includes a coating layer 400 on the inner and outer surfaces of the sensor cap 400, which is coated with a material for infrared radiation reflection or blocking / (450, 460) are formed.

In the case of infrared rays generated by external heat, the inside of the sensor cap 400 is heated due to infrared rays irradiating the outer surface of the sensor cap 400 in addition to the infrared rays passing through the light receiving hole 430, The sensor cap outer surface coating layer 460 functions to shield heat by coating an infrared reflective material to dissipate heat. It is a matter of course that a general metal material can be used for the infrared reflection material, and a material having a high infrared reflectance can be used by synthesizing various polymer materials. In order to effectively block heat or infrared rays generated by the operation of the PCB substrate 100 or the electronic device, it is preferable to coat the inner surface of the sensor cap 400 with an infrared absorbing and blocking material.

As described above, according to the embodiment of the present invention, the inner and outer surfaces of the sensor cap 400 are coated with the infrared reflection, absorption, and blocking materials to efficiently dissipate the generated heat internally and externally, thereby improving the performance and reliability of the temperature sensor .

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Accordingly, the embodiments disclosed herein are for the purpose of describing rather than limiting the technical spirit of the present invention, and it is apparent that the scope of the technical idea of the present invention is not limited by these embodiments. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: PCB substrate 200: thermopile
300: Lead-out IC 400: Sensor cap
430: receiving hole 450: inner side coating layer
435: Lens 460: Outer side coating layer

Claims (7)

PCB substrate;
A thermopile provided on a part of the upper surface of the substrate;
A lead-out IC provided on a part of the upper surface of the substrate; And
And a sensor cover having a structure that covers the substrate and a space to form a space therebetween, the sensor cap having a light receiving hole at a position corresponding to an upper portion of the thermopile,
Wherein a coating layer for heat radiation is formed on an inner surface or an outer surface of the sensor cap.
The method according to claim 1,
Wherein a coating layer made of an infrared reflecting material is formed on an inner surface and an outer surface of the sensor cap.
The method according to claim 1,
Wherein the coating layer comprises:
Glass, and PTFE (Polytetrafluoroethylene).
The method according to claim 1,
Wherein a coating layer of an infrared absorbing and shielding material is formed on an inner surface and an outer surface of the sensor cap.
The method according to claim 1,
And a lens or an infrared filter is provided under the light receiving hole or the light receiving hole.
The method according to claim 1,
The coating layer
And a mixture of infrared absorbing and shielding materials including a metal, a silane, and an organic or inorganic compound.
The method according to claim 1,
Wherein the coating layer comprises:
Phthalocyanine, naphthalocyanine, metal complex compounds, azo dyes, anthraquinone,
Wherein the thermopile temperature sensor is made of a material comprising a substance group including at least one of a quinic acid derivative, a coumaric acid derivative, an iminium dyestuff, perylene, quaterrier, and polymethine.
KR1020150154579A 2015-11-04 2015-11-04 Temperature sensor with thermopile KR101737400B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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KR20210039750A (en) 2019-10-02 2021-04-12 안상로 Real-time 3d mapping system for underground space using drone(robot)
KR102266812B1 (en) 2020-12-01 2021-06-17 안상로 Three Dimension Location Mapping System of Underground Passage Using Gyro Sensors and Encoder
WO2022192462A1 (en) * 2021-03-09 2022-09-15 James Masten Shielding and differentiating receiver for radiant heating processes

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Publication number Priority date Publication date Assignee Title
WO2021209817A1 (en) * 2020-04-13 2021-10-21 T-Smart Systems Llc Structure and method of manufacturing for a hermetic housing enclosure for a thermal shock proof, zero thermal gradient imaging or sensing core

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210039750A (en) 2019-10-02 2021-04-12 안상로 Real-time 3d mapping system for underground space using drone(robot)
KR102266812B1 (en) 2020-12-01 2021-06-17 안상로 Three Dimension Location Mapping System of Underground Passage Using Gyro Sensors and Encoder
WO2022192462A1 (en) * 2021-03-09 2022-09-15 James Masten Shielding and differentiating receiver for radiant heating processes
US11827966B2 (en) 2021-03-09 2023-11-28 James William Masten, JR. Shielding and differentiating receiver for radiant heating processes

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