CN202836768U - Integrated optical fiber infrared temperature measuring device - Google Patents

Integrated optical fiber infrared temperature measuring device Download PDF

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Publication number
CN202836768U
CN202836768U CN 201120575223 CN201120575223U CN202836768U CN 202836768 U CN202836768 U CN 202836768U CN 201120575223 CN201120575223 CN 201120575223 CN 201120575223 U CN201120575223 U CN 201120575223U CN 202836768 U CN202836768 U CN 202836768U
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CN
China
Prior art keywords
infrared temperature
output
coupled lens
measurement apparatus
temperature measurement
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Expired - Fee Related
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CN 201120575223
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Chinese (zh)
Inventor
杨向辉
刘兰书
张文松
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XI'AN HEQI OPTO-ELECTRONIC TECHNOLOGY Co Ltd
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XI'AN HEQI OPTO-ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

The utility model relates to an integrated optical fiber infrared temperature measuring device, mainly comprising an object (1) to be measured, an optical system (2), a photoelectric detecting unit (3), an operational amplifier (4), an analog-digital collection unit (5), an MCU (6) and a PC display (7) which are sequentially connected. The optical system (2) of the measuring device adopts the design that an aiming optical-path and a measuring optical-path are coaxial, and the object (1) to be measured and a central processing unit (7) are separated by using a light transmission beam. 4-20mA or 0-5V analog output of the infrared temperature measuring device can be communicated with an external system or device. The integrated optical fiber infrared temperature measuring device has the advantages of strong electromagnetic interference resistance, high reliability, high measurement precision and the like.

Description

The integrated fiber infrared temperature measurement apparatus
Technical field:
The utility model belongs to technical field of optical fiber sensing, relates to a kind of integrated fiber infrared temperature measurement apparatus.
Background technology:
Many hot environments are arranged, such as metal smelt, generating plant large-sized boiler, Chemical Manufacture etc. in commercial production.For guaranteeing that production equipment reaches safely the quality of product, these hot environments are carried out accurately real-time monitoring very necessary.At present, infrared measurement of temperature is the most effective a kind of monitoring method, and it is a kind of method of non-contact temperature measuring, and temperature element does not need to contact with measured medium, and measures temperature by its heat radiation.Along with the development of industrial or agricultural, Defence business and medical science, require more and more higher to thermometric precision.In some occasion, infrared temperature-test technology has caused the generally attention of each side.
But the shortcoming such as the traditional infrared temp measuring system has aiming and measures disalignment, is subject to environmental interference, and measuring error is large has limited its application.The utility model is to the optical system of traditional infrared temperature measurer, hardware components, and software section redesigns.Introduce the biography light beam and increase laser indication function at the detector receiving front-end, greatly improved measuring accuracy and the performance of system, the characteristics such as had that signal to noise ratio (S/N ratio) is high, resolution is high, measuring accuracy is high, test speed is fast, measure and aimed at and output interface is diversified coaxial.
The utility model content:
The purpose of this utility model provides a kind of integrated fiber infrared temperature measurement apparatus.
The problems such as the utility model solves aiming that the traditional infrared temp measuring system exists and measures disalignment, is subject to environmental interference, and measuring error is large.
Integrated fiber infrared temperature measurement apparatus described in the utility model comprises object under test (1), optical system (2), photodetection unit (3), operational amplifier (4), modulus collecting unit (5), MCU (6) and PC show (7), the output of object under test (1) is connected with the input of optical system (2), the output of optical system (2) is connected with photodetection unit (3) input, the output of photodetection unit (3) is connected with operational amplifier (4) input, the output of operational amplifier (4) is connected with the input of modulus collecting unit (5), the output of modulus collecting unit (5) is connected 6 with MCU) the input connection, MCU (6) output shows being connected of (7) with PC, in conjunction with infrared temperature-test technology and optical fiber sensing technology, realize anti-electromagnetic interference (EMI), high precision, high duplication, fast response, contactless temperature survey.
Optical system described in the utility model (2) comprises coupled lens one (21), passes light beam (22), coupled lens two (23), red-light LED diode (24), optical filter (25), coupled lens three (26) and photodetector (27), and ruddiness aiming light path is coaxial with the infrared light optical path.
Optical path of the present utility model is that the infrared long wave that object under test (1) gives off is coupled into biography light beam (22) through front end coupled lens one (21), form directional light by optical filter (25) through coupled lens two (23) again, coupled lens (26) will be assembled infrared long wave and focus on the photodetector (27), be converted to voltage signal output through photodetector (27).
Aiming light path of the present utility model is to be that the red-light LED diode (24) of 650nm sends directional light by wavelength, after filtration mating plate (25) reflection, enter coupled lens two (23), focus on and pass light beam (22), be indicated to object under test (1) by coupled lens one (21).
Optical path of the present utility model shares identical optical channel with coupling optical path, and the temperature information that adopts optical path to measure is the temperature information of object under test (1) position of aiming light path indication.
Coupled lens one (21) of the present utility model, coupled lens two (23) and coupled lens three (26) are used for improving the light path coupling efficiency, can according to the difference of temperature-measuring range, adopt glass, magnesium oxide, silicon or germanium material to make.
Biography light beam of the present utility model (22) is used for isolation object under test (1) and MCU (6), realizes the function of anti-electromagnetic interference (EMI).
Optical filter of the present utility model (23) is to the infrared light full impregnated, and 650nm ruddiness is all-trans, being miter angle in the application installs, guarantee infrared light optical path signal full impregnated, the ruddiness aiming optical path signal of 650nm is all-trans, so that the aiming light path has identical optical channel with optical path, red aiming light path indicating positions is the detecting location of optical path.
Operational amplifier of the present utility model (4) adopts the TLC4502ID amplifier chip of TI company that photodetector (27) output signal is amplified.The high-performance self calibration dual operational amplifier that operational amplifier (4) adopts the CMOS technology to make has very high DC current gain and good Power Supply Rejection Ratio and common-mode rejection ratio, can suppress the impact that environmental interference produces.
Modulus collecting unit of the present utility model (5) has adopted low noise, 24 of high precision, and have the modulus conversion chip of programme-controlled gain provide quick, high-precision analog to digital conversion with seldom pin, also have simultaneously sampling hold circuit, reduced the measuring error of system.
Simulation output interface of the present utility model forms the communication of realization and external system and equipment by 4-20mA, 0-5V simulation output and the output of RS485 numeral.
Advantage of the present utility model:
1) the utility model is by passing light beam (22) transmission infrared energy, realize object under test (1) and MCU (6) isolation, so that electronic component is subjected to the electromagnetic environment interference little, effectively improve the product anti-electromagnetic interference capability, be particularly suitable under the strong-electromagnetic field environment such as medium-high frequency induction heating equipment, using, stable and reliable for performance.
2) the utility model is realized aiming and is measured coaxially, and aiming light path and optical path share one and pass light beam, and little target accurately aims at measurement, and temperature measurement accuracy is high.
3) the utility model is high temperature resistant up to 200 ℃, can be installed in the occasion that other infrared thermometer can't be installed, and volume is small and exquisite, is fit to the narrow occasion of installing space.
4) the utility model adopts advanced signal processing technology, and measuring accuracy is high, and duplicate measurements is stable, and fast response time reaches a millisecond magnitude, can measure the surface temperature of rapid moving object.
5) the utility model can multiple output signal: 4-20mA, 0-5V, RS485, relay etc., can be connected with all kinds of control instruments, registering instrument, computer measurement and control system.
Description of drawings:
Fig. 1 is that the integrated fiber infrared temperature measurement apparatus forms schematic diagram
Fig. 2 is that optical system (2) forms schematic diagram
Fig. 3 is operational amplifier (4) amplifying circuit schematic diagram
Fig. 4 is modulus collecting unit (5) and PC communication schematic diagram
Fig. 5 is simulation output interface schematic diagram
Embodiment:
The utility model comprises that object under test (1), optical system (2), photodetection unit (3), operational amplifier (4), modulus collecting unit (5), MCU (6) and PC show (7).Wherein optical system (2) is by coupled lens one (21), biography light beam (22), coupled lens two (23), LED photodiode (24), optical filter (25), coupled lens three (26) and photodetector (27).
Coupled lens one (21) of the present utility model, coupled lens two (23) and coupled lens three (26) are made according to the different choice different materials of temperature-measuring range;
Optical filter of the present utility model (23) is to the infrared light full impregnated, and 650nm ruddiness is all-trans, and is miter angle in the application and installs.
The utility model is to realize that like this aiming light path and optical path are coaxial, aiming light path and optical path share one and pass light beam: the infrared long wave that survey object under test (1) gives off is coupled into through front end coupled lens one (21) and passes light beam (22), form directional light by optical filter (25) through coupled lens two (23) again, coupled lens (26) will be assembled infrared long wave and focus on the photodetector (27), be converted to voltage signal output through photodetector (27).Simultaneously, aiming optical routing wavelength is that the red-light LED diode (24) of 650nm sends directional light, after filtration mating plate (25) reflection, enter coupled lens two (23), focus on and pass light beam (22), be indicated to object under test (1) by coupled lens one (21), illuminate the tested part of target, finish deixis.
The utility model is to realize so anti-electromagnetic environment interference, optical system (2) is transferred to the signal of object under test (1) radiation on the operational amplifier (4), optical system (2) itself is to the electromagnetic signal immunity, the high-performance self calibration dual operational amplifier that operational amplifier (4) adopts the CMOS technology to make, have very high DC current gain and good Power Supply Rejection Ratio and common-mode rejection ratio, also can suppress the impact of environmental interference.
The utility model is to realize that like this high-precision temperature measures, and modulus collecting unit (5) has been used low noise, and 24 of high precision have the modulus conversion chip of programme-controlled gain, and quick, high-precision analog to digital conversion is provided, and also have simultaneously sampling hold circuit.

Claims (6)

1. integrated fiber infrared temperature measurement apparatus, it is characterized in that: this integrated fiber infrared temperature measurement apparatus comprises object under test (1), optical system (2), photodetection unit (3), operational amplifier (4), modulus collecting unit (5), MCU (6) and PC show (7), the output of object under test (1) is connected with the input of optical system (2), the output of optical system (2) is connected with photodetection unit (3) input, the output of photodetection unit (3) is connected with operational amplifier (4) input, the output of operational amplifier (4) is connected with the input of modulus collecting unit (5), the output of modulus collecting unit (5) is connected 6 with MCU) the input connection, MCU (6) output shows being connected of (7) with PC, in conjunction with infrared temperature-test technology and optical fiber sensing technology, realize anti-electromagnetic interference (EMI), high precision, high duplication, fast response, contactless temperature survey.
2. a kind of integrated fiber infrared temperature measurement apparatus according to claim 1, it is characterized in that: described optical system (2) is comprised of coupled lens one (21), biography light beam (22), coupled lens two (23), red-light LED diode (24), optical filter (25), coupled lens three (26) and photodetector (27), and ruddiness aiming light path is coaxial with the infrared light optical path.
3. a kind of integrated fiber infrared temperature measurement apparatus according to claim 2, it is characterized in that: described coupled lens one (21), coupled lens two (23) and coupled lens three (26) adopt glass, magnesium oxide, silicon or germanium material to make, and improve the light path coupling efficiency.
4. a kind of integrated fiber infrared temperature measurement apparatus according to claim 2 is characterized in that: described optical filter (25) is to the infrared light full impregnated, and 650nm ruddiness is all-trans, and is miter angle in the application and installs.
5. a kind of integrated fiber infrared temperature measurement apparatus according to claim 1 is characterized in that: described operational amplifier (4) adopts the TLC4502ID amplifier chip of TI company to carry out the amplification of photodetector output signal.
6. a kind of integrated fiber infrared temperature measurement apparatus according to claim 1 is characterized in that: also comprise the simulation output interface, form realization and external system and device talk by 4-20mA, 0-5V simulation output or the output of RS485 numeral.
CN 201120575223 2011-12-30 2011-12-30 Integrated optical fiber infrared temperature measuring device Expired - Fee Related CN202836768U (en)

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Application Number Priority Date Filing Date Title
CN 201120575223 CN202836768U (en) 2011-12-30 2011-12-30 Integrated optical fiber infrared temperature measuring device

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Application Number Priority Date Filing Date Title
CN 201120575223 CN202836768U (en) 2011-12-30 2011-12-30 Integrated optical fiber infrared temperature measuring device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021289A (en) * 2014-04-30 2015-11-04 热映光电股份有限公司 non-contact temperature measurement apparatus
CN106644097A (en) * 2016-12-05 2017-05-10 皖江新兴产业技术发展中心 High-precision non-contact type road surface temperature measuring device and method thereof
CN107389202A (en) * 2017-08-10 2017-11-24 长春理工大学光电信息学院 A kind of non-contact optical temperature measuring equipment and its fuzzy control method
CN112964369A (en) * 2021-03-08 2021-06-15 南京络联测控技术有限公司 Outdoor wireless real-time temperature measuring device and using method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021289A (en) * 2014-04-30 2015-11-04 热映光电股份有限公司 non-contact temperature measurement apparatus
CN106644097A (en) * 2016-12-05 2017-05-10 皖江新兴产业技术发展中心 High-precision non-contact type road surface temperature measuring device and method thereof
CN106644097B (en) * 2016-12-05 2019-05-28 皖江新兴产业技术发展中心 A kind of high-precision non-contact road surface temperature measuring device and its measurement method
CN107389202A (en) * 2017-08-10 2017-11-24 长春理工大学光电信息学院 A kind of non-contact optical temperature measuring equipment and its fuzzy control method
CN112964369A (en) * 2021-03-08 2021-06-15 南京络联测控技术有限公司 Outdoor wireless real-time temperature measuring device and using method thereof

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C14 Grant of patent or utility model
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PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Integrated optical fiber infrared temperature measuring device

Effective date of registration: 20140523

Granted publication date: 20130327

Pledgee: Xi'an innovation financing Company limited by guarantee

Pledgor: XI'AN HEQI OPTO-ELECTRONIC TECHNOLOGY CO., LTD.

Registration number: 2014990000401

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20150707

Granted publication date: 20130327

Pledgee: Xi'an innovation financing Company limited by guarantee

Pledgor: XI'AN HEQI OPTO-ELECTRONIC TECHNOLOGY CO., LTD.

Registration number: 2014990000401

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130327

Termination date: 20141230

EXPY Termination of patent right or utility model