CN107389202A - A kind of non-contact optical temperature measuring equipment and its fuzzy control method - Google Patents

A kind of non-contact optical temperature measuring equipment and its fuzzy control method Download PDF

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Publication number
CN107389202A
CN107389202A CN201710680236.8A CN201710680236A CN107389202A CN 107389202 A CN107389202 A CN 107389202A CN 201710680236 A CN201710680236 A CN 201710680236A CN 107389202 A CN107389202 A CN 107389202A
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temperature
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msub
optical
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CN107389202B (en
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战荫泽
李居尚
张立东
周海涵
韩东旭
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Changchun University of Science and Technology College of Optical and Electronical Information
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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
    • G01J5/0205—Mechanical elements; Supports for optical elements
    • 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
    • G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

The invention discloses a kind of non-contact optical temperature measuring equipment, including：First thermometric plate；Second thermometric plate, it is oppositely arranged with the first thermometric plate；Multiple optical detecting gears, it is set in qually spaced on the thermometric plate, including optical system and detector, when the infrared energy of testee radiation by air media transmission to array type optical detection device when, optical system is by the energy centralization of target emanation to detector；Ambient temperature and humidity temperature measurement module, it is arranged on the first thermometric plate；Data processing equipment, it connects the optical detecting gear and environment temperature measurement module；For recording the electric signal of detection device and Temperature Humidity Sensor transmission, while according to the true temperature of the electric signal of transmission calculating testee, in addition to it is optical measuring device fuzzy control method that one kind is non-contact.

Description

A kind of non-contact optical temperature measuring equipment and its fuzzy control method
Technical field
The present invention relates to optics field of temperature measurement, more particularly to it is that optical temperature measurement device and one kind are contactless that one kind is non-contact Optical temperature measurement device fuzzy control method.
Background technology
When any object is in more than absolute zero, all can in the form of certain wavelengths of electromagnetic outside emittance, spoke The formula temperature instrumentation of penetrating be exactly using made of the principle that changes with its temperature of emittance of object, only need to be temperature during measurement Degree meter optical receiving system alignment testee, without being contacted with object, therefore can measure the temperature of moving object not The temperature field of object can be destroyed, further, since temperature-sensing element only receives radiation energy, it is not necessary to reach the actual temperature of testee, Theoretically, it does not have the upper limit, can measure high temperature, but the temperature calibration of non-contact temperature measuring device and thermometric accuracy carry Height is always a problem.
The content of the invention
The present invention has designed and developed a kind of non-contact optical temperature measuring equipment, using the thermometric plate being oppositely arranged, can accommodate The object of motion is by being easy to measurement and practicality.
It is a still further object of the present invention to provide a kind of fuzzy control method of non-contact optical temperature measuring equipment, pass through ring Environmental temperature and humidity, testee highly calculate demarcation object temperature, can effectively reduce measurement error, universality is good.
Technical scheme provided by the invention is：
A kind of non-contact optical temperature measuring equipment, including：
First thermometric plate；
Second thermometric plate, it is oppositely arranged with the first thermometric plate；
Multiple optical detecting gears, it is set in qually spaced on the thermometric plate, including optical system and detector, works as quilt Survey the infrared energy of object radiation by air media transmission to array type optical detection device when, optical system is by target emanation Energy centralization to detector；
Ambient temperature and humidity temperature measurement module, it is arranged on the first thermometric plate；
Data processing equipment, it connects the optical detecting gear and environment temperature measurement module；For record detection device and The electric signal of Temperature Humidity Sensor transmission, while according to the true temperature of the electric signal of transmission calculating testee.
Preferably, its photomultiplier tube detectors of the detector or polycrystalline silicon material near infrared detector.
Preferably, in addition to：Height measuring device, it is arranged on above the first thermometric plate by camber beam, is used for Detect testee height.
Preferably, in addition to：
Display, it is arranged on the outside of the second thermometric plate；
Power supply module, it is arranged in the second thermometric plate, and it is warm and humid to connect the array type optical detection device, environment Spend temperature measurement module and data processing equipment.
Preferably, the display uses liquid crystal display, shows the temperature that the data processing equipment calculates.
Preferably, the camber beam is square, and one end is fixedly installed on above the first thermometric plate, other end connection Height measuring device.
A kind of fuzzy control method of non-contact optical temperature measuring equipment, including：
Step 1：Multiple optical detecting gears detect the temperature of testee, are designated as T1,T2,T3…Tn, elevation carrection Sensor detection object height hc, calculate the apparent temperature T of testeemea；
Step 2：Temperature sensor monitors environment temperature Tenv, humidity sensor detection ambient humidity RHenv, and by environment The altitude signal input fuzzy controller of temperature signal, ambient humidity signal and testee obtains temperature error signals；
Step 3：To apparent progress radiance correction, the medium temperature of testee is obtained, according to the apparent of testee Temperature and error signal calculation obtain actual temperature.
Preferably, the fuzzy set of the altitude signal of ambient humidity signal and testee is：NB, NM, NS, ZR, PS, PM, PB }, NB represents negative big, and during NM represents negative, NS represents negative small, and ZR represents that zero, PS represents just small, and PM represents center, PB tables Show honest, their domain is：{ -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6 }.
Preferably, in the step 3, medium temperature radiance correction calculation formula is：
Wherein, σ is the mean square deviation of sampled data, and ε is radiance, and value is 0.1~0.9.
Preferably, the actual change scope of the temperature error signals is [χmin,χmac], calculation formula is：
α be optical system detection angle, TmaxThe maximum temperature detected for optical detecting gear,For sampled data Mean temperature, σ be sampled data mean square deviation；χmin=-χmax。
Beneficial effect of the present invention
The present invention has designed and developed a kind of non-contact optical temperature measuring equipment, using the thermometric plate being oppositely arranged, can accommodate The object of motion is by being easy to measurement and practicality, also providing a kind of fuzzy control method of non-contact optical temperature measuring equipment, lead to Ambient temperature and humidity is crossed, testee highly calculates demarcation object temperature, can effectively reduce measurement error, universality is good.
Brief description of the drawings
Fig. 1 is the structural representation of non-contact optical thermometric temperature device of the present invention.
Fig. 2 is the theory diagram of non-contact optical temperature measuring equipment of the present invention.
Fig. 3 is environment temperature T of the present invention membership function table.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text Word can be implemented according to this.
As shown in Figure 1-2, non-contact optical temperature measuring equipment provided by the invention, including：First thermometric plate 100, second Thermometric plate 200, optical detecting gear 300 and ambient temperature and humidity temperature measurement module 400；
Wherein, the first thermometric plate 100 and the second thermometric plate 200 are oppositely arranged, and multiple optical detecting gears 300 are equidistant Be arranged on thermometric plate, optical detecting gear 300 includes optical system 310 and detector 320, when testee radiation it is red Outer energy by air media transmission to optical detecting gear 300 when, optical system 310 by the energy centralization of target emanation to visit Survey on device 320；Ambient temperature and humidity temperature measurement module 400 is arranged on the first thermometric plate 100；Data processing equipment 500 connects optics Detection device 300 and environment temperature measurement module 400；For recording the electric signal of detection device and Temperature Humidity Sensor transmission, simultaneously The true temperature of testee is calculated according to the electric signal of transmission, as a preferred embodiment, detector 320 is visited using photomultiplier Survey device or polycrystalline silicon material near infrared detector.
In another embodiment, non-contact optical temperature measuring equipment, in addition to height measuring device 600, it passes through camber beam 610 are arranged on the top of the first thermometric plate 100, and for detecting testee height, camber beam 610 is square, and one end is fixedly installed Above the first thermometric plate 100, other end connection height measuring device 600.
In another embodiment, in addition to：Display, it is arranged on the outside of the second thermometric plate 200；Power supply module, it sets Put in the second thermometric plate 200, connection optical detecting gear 300, ambient temperature and humidity temperature measurement module 400 and data processing equipment 500, as a preferred embodiment, display uses liquid crystal display, show the temperature that the data processing equipment calculates.
A kind of fuzzy control method of non-contact optical temperature measuring equipment, including：
Step 1：Multiple optical detecting gears detect the temperature of testee, according to the installation position of optical detecting gear Put and be designated as T from bottom to top0,T1,T2,T3…Tn, elevation carrection sensor detection object height hc, calculate the apparent temperature of testee Spend Tmea；
CalculateRatio, it is convenient for statement, the ratio calculated is designated as I, i.e.,Wherein, D One thermometric plate and the second thermometric plate substructure height；M is the spacing of optical detecting gear；
Obtained ratio I is rounded, numerical value will be rounded and be designated as [I]=k；
If I >=k+0.5, the apparent temperature of testee is
If I ＜ k+0.5, the apparent temperature of testee are
Wherein, TmaxThe maximum temperature detected for optical detecting gear, TminDetected for optical detecting gear minimum Temperature, α are the detection angle of optical system；
Step 2：Temperature sensor monitors environment temperature Tenv, humidity sensor detection ambient humidity RHenv, and by environment The altitude signal input fuzzy controller of temperature signal, ambient humidity signal and testee obtains temperature error signals；
A kind of fuzzy control method of non-contact optical temperature measuring equipment, it is characterised in that including：
Step 1：Multiple optical detecting gears detect the temperature of testee, are designated as T1,T2,T3…Tn, elevation carrection Sensor detection object height hc, calculate the apparent temperature T of testeemea；
Step 2：Temperature sensor monitors environment temperature Tenv, humidity sensor detection ambient humidity RHenv, and by environment The altitude signal input fuzzy controller of temperature signal, ambient humidity signal and testee obtains temperature error signals；
Step 3：To apparent progress radiance correction, the medium temperature of testee is obtained,
Medium temperature radiance corrects calculation formula：
Wherein, σ is the mean square deviation of sampled data, and ε is radiance, and value is 0.1~0.9.
Temperature sensor detects environment temperature T, humidity sensor detection ambient humidity RH, testee height h；
Wherein, T, RH, h actual change scope be respectively [- 30,30], [- 0.5,0.5], [0,3]；T discrete domain Discrete domain for { -2, -1,0,1,2 } RH, h is { -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6 }
Then scale factor k1=2/30, k2=6/0.5, k3=6/1.5
Error χ actual change value is [χmin,χmax], worst error χmaxWith minimal error χmin
The temperature signal that record optical detecting gear gathers within the sampling period, and pick out optical detecting gear and detect Maximum temperature；
Error χ actual change scope solves calculation formula：
α be optical system detection angle, TmaxThe maximum temperature detected for optical detecting gear,For sampled data Mean temperature, σ be sampled data mean square deviation；χmin=-χmax。
The discrete domain of error signal is { -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6 }
Scale factor is k4=12/ (χmax-χmin)
Ambiguity in definition subset and membership function
Environment temperature, T points are 3 fringes：PB (honest), PM (center), PS (just small), incorporate experience intoWater Warm T membership function table, as shown in figure 3, environment temperature T membership function table, fuzzy for seven RH points of ambient humidity State：PB (honest), PM (center), PS (just small), 0 (zero), NS (negative small), NM (in negative), NB (negative big), incorporate experience into Go out Chinese yam weight Q membership function table, as shown in table 1.
The ambient humidity RH of table 1 membership function table
Q -6 -5 -4 -3 -2 -1 -0 +1 +2 +3 +4 +5 +6
PB 0 0 0 0 0 0 0 0 0 0 0.2 0.7 1.0
PM 0 0 0 0 0 0 0 0 0.2 0.8 1.0 0.8 0.2
PS 0 0 0 0 0 0 0 0.8 1.0 0.8 0.2 0 0
0 0 0 0 0 0 0.5 1.0 0.5 0 0 0 0 0
NB 0 0 0.2 0.8 1.0 0.8 0 0 0 0 0 0 0
NM 0.2 0.8 1.0 0.8 0.2 0 0 0 0 0 0 0 0
NS 1.0 0.7 0.2 0 0 0 0 0 0 0 0 0 0
Testee height, h points are seven fringes：PB (honest), PM (center), PS (just small), 0 (zero), NS (negative small), NM (in negative), NB (negative big), incorporates experience into the membership function table for drawing turbidity ω in cleaning machine, such as the institute of table 2 Show.
The testee height h of table 2 membership function table
ω -6 -5 -4 -3 -2 -1 -0 +1 +2 +3 +4 +5 +6
PB 0 0 0 0 0 0 0 0 0 0 0.2 0.7 1.0
PM 0 0 0 0 0 0 0 0 0.2 0.8 1.0 0.8 0.2
PS 0 0 0 0 0 0 0 0.8 1.0 0.8 0.2 0 0
0 0 0 0 0 0 0.5 1.0 0.5 0 0 0 0 0
NB 0 0 0.2 0.8 1.0 0.8 0 0 0 0 0 0 0
NM 0.2 0.8 1.0 0.8 0.2 0 0 0 0 0 0 0 0
NS 1.0 0.7 0.2 0 0 0 0 0 0 0 0 0 0
Fuzzy reasoning process has to carry out the matrix operation of complexity, and amount of calculation is very big, and on-line implement reasoning is difficult to meet The requirement of control system real-time, the present invention carry out fuzzy reasoning computing using look-up table, and Fuzzy inferential decision is using three inputs The mode singly exported.
The preliminary control rule of fuzzy controller can be summed up by experience, wherein parameter χ controls rule is shown in Table 3.
Table 3 is fuzzy control rule table
Fuzzy controller carries out defuzzification according to the fuzzy value drawn to output signal, obtains temperature error, modulus paste Control query table, because domain is discrete, fuzzy control rule and a fuzzy matrix can be expressed as, be obscured using single-point Change, obtain fuzzy polling list.
Actual temperature, T are obtained according to the apparent temperature of testee and error signal calculationmid=Tmea+χ。
In another embodiment, error χ actual change scope solves, and is solved using mean point method, process is as follows：
The positive stroke of each demarcation circulation of optical temperature measurement device is averagely obtained into average value and produces a mean linear.
By all experimentss data (nn,Tn) it is divided into two groups, it is desirable to two groups of experimental data approximately equals, wherein, nnFor experiment Data amount check, TnFor with nnCorresponding temperature calibration data, unThe apparent temperature output valve detected for optical temperature measurement device. That is un=Tmea
Every group of data have oneself " point system " center ", its coordinate are：
By all detection data (un, Tn) bring into respectively in (1) (2) formula and obtain two " point system " center " coordinates
Pass through two " point system " center "sStraight line be regression straight line.
Solve the slope κ and intercept b of regression straight line
SlopeIntercept
Regression beeline equation un=Tn·κ+b
Temperature experimental data T is substituted into according to regression beeline equationn, obtain output valve un。
Calculate output valve unMaximum deviation Δ L with demarcating average valuemax
Make χmin=-χmax
The present invention has designed and developed a kind of non-contact optical temperature measuring equipment, using the thermometric plate being oppositely arranged, can accommodate The object of motion is by being easy to measurement and practicality, also providing a kind of fuzzy control method of non-contact optical temperature measuring equipment, lead to Ambient temperature and humidity is crossed, testee highly calculates demarcation object temperature, can effectively reduce measurement error, universality is good.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, it is of the invention and unlimited In specific details and shown here as the legend with description.

Claims (10)

  1. A kind of 1. non-contact optical temperature measuring equipment, it is characterised in that including：
    First thermometric plate；
    Second thermometric plate, it is oppositely arranged with the first thermometric plate；
    Multiple optical detecting gears, it is set in qually spaced on the thermometric plate, including optical system and detector, works as measured object The infrared energy of body radiation by air media transmission to array type optical detection device when, optical system is by the energy of target emanation Amount converges to detector；
    Ambient temperature and humidity temperature measurement module, it is arranged on the first thermometric plate；
    Data processing equipment, it connects the optical detecting gear and environment temperature measurement module；For recording detection device and warm and humid The electric signal of sensor passes is spent, while the true temperature of testee is calculated according to the electric signal of transmission.
  2. 2. non-contact optical temperature measuring equipment according to claim 1, it is characterised in that its photomultiplier transit of the detector Pipe detector or polycrystalline silicon material near infrared detector.
  3. 3. non-contact optical temperature measuring equipment according to claim 1, it is characterised in that also include：Height measuring device, It is arranged on above the first thermometric plate by camber beam, for detecting testee height.
  4. 4. the non-contact optical temperature measuring equipment according to Claims 2 or 3, it is characterised in that also include：
    Display, it is arranged on the outside of the second thermometric plate；
    Power supply module, it is arranged in the second thermometric plate, connects the array type optical detection device, ambient temperature and humidity is surveyed Warm module and data processing equipment.
  5. 5. non-contact optical temperature measuring equipment according to claim 4, it is characterised in that the display uses liquid crystal Show device, show the temperature that the data processing equipment calculates.
  6. 6. non-contact optical temperature measuring equipment according to claim 3, it is characterised in that the camber beam is square, one End is fixedly installed on above the first thermometric plate, other end connection height measuring device.
  7. A kind of 7. fuzzy control method of non-contact optical temperature measuring equipment, it is characterised in that including：
    Step 1：Multiple optical detecting gears detect the temperature of testee, are designated as T1,T2,T3…Tn, elevation carrection sensor Detection object height hc, calculate the apparent temperature T of testeemea；
    Step 2：Temperature sensor monitors environment temperature Tenv, humidity sensor detection ambient humidity RHenv, and by environment temperature The altitude signal input fuzzy controller of signal, ambient humidity signal and testee obtains temperature error signals；
    Step 3：To apparent progress radiance correction, the medium temperature of testee is obtained, according to the apparent temperature of testee Actual temperature is obtained with error signal calculation.
  8. 8. the fuzzy control method of non-contact optical temperature measuring equipment according to claim 7, it is characterised in that environmental wet The fuzzy set of altitude signal of degree signal and testee is：{ NB, NM, NS, ZR, PS, PM, PB }, NB represent negative big, and NM is represented In negative, NS represents negative small, and ZR represents that zero, PS represents just small, and PM represents center, and PB represents honest, and their domain is：- 6 ,- 5, -4, -3, -2, -1,0,1,2,3,4,5,6 }.
  9. 9. the fuzzy control method of non-contact optical temperature measuring equipment according to claim 8, it is characterised in that the step In rapid three, medium temperature radiance correction calculation formula is：
    <mrow> <msub> <mi>T</mi> <mrow> <mi>m</mi> <mi>i</mi> <mi>d</mi> </mrow> </msub> <mo>=</mo> <msub> <mi>T</mi> <mrow> <mi>m</mi> <mi>e</mi> <mi>a</mi> </mrow> </msub> <mo>/</mo> <mroot> <mi>&amp;epsiv;</mi> <mn>4</mn> </mroot> <msubsup> <mo>&amp;Integral;</mo> <msub> <mi>T</mi> <mi>min</mi> </msub> <mi>&amp;infin;</mi> </msubsup> <mfrac> <msub> <mi>T</mi> <mi>n</mi> </msub> <msup> <mi>&amp;sigma;</mi> <mn>2</mn> </msup> </mfrac> <mo>&amp;lsqb;</mo> <mo>-</mo> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> <mrow> <mo>(</mo> <mfrac> <msub> <mi>T</mi> <mi>n</mi> </msub> <mi>&amp;sigma;</mi> </mfrac> <mo>)</mo> </mrow> <mo>&amp;rsqb;</mo> <msub> <mi>dT</mi> <mi>n</mi> </msub> </mrow>
    Wherein, σ is the mean square deviation of sampled data, and ε is radiance, and value is 0.1~0.9.
  10. 10. the fuzzy control method of non-contact optical temperature measuring equipment according to claim 8 or claim 9, it is characterised in that institute The actual change scope for stating temperature error signals is [χmin,χmac], calculation formula is：
    <mrow> <msub> <mi>&amp;chi;</mi> <mrow> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>=</mo> <mn>0.75</mn> <mi>sin</mi> <mi>&amp;alpha;</mi> <mo>&amp;lsqb;</mo> <mn>2.08</mn> <mi>ln</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <msub> <mi>T</mi> <mi>max</mi> </msub> <mo>-</mo> <mover> <mi>T</mi> <mo>&amp;OverBar;</mo> </mover> </mrow> <mi>&amp;sigma;</mi> </mfrac> <mo>)</mo> </mrow> <mo>-</mo> <mn>0.8</mn> <mo>&amp;rsqb;</mo> <mo>&amp;lsqb;</mo> <mn>0.02</mn> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <msub> <mi>T</mi> <mrow> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>-</mo> <mover> <mi>T</mi> <mo>&amp;OverBar;</mo> </mover> </mrow> <mi>&amp;sigma;</mi> </mfrac> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <mn>0.9</mn> <mrow> <mo>(</mo> <mfrac> <mrow> <msub> <mi>T</mi> <mrow> <mi>m</mi> <mi>a</mi> <mi>x</mi> </mrow> </msub> <mo>-</mo> <mover> <mi>T</mi> <mo>&amp;OverBar;</mo> </mover> </mrow> <mi>&amp;sigma;</mi> </mfrac> <mo>)</mo> </mrow> <mo>+</mo> <mn>0.1</mn> <mo>&amp;rsqb;</mo> </mrow>
    α be optical system detection angle, TmaxThe maximum temperature detected for optical detecting gear,For being averaged for sampled data Temperature, σ are the mean square deviation of sampled data；χmin=-χmax。
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CN109813866A (en) * 2019-01-24 2019-05-28 中南大学 The measuring system and measurement method of unsaturation frozen soil matric potential
CN111044156A (en) * 2019-12-13 2020-04-21 上海交通大学 Optical shutter type non-modulation infrared temperature measurement system and method

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