CN107588854B - High precision measuring temperature method based on built-in reference body - Google Patents
High precision measuring temperature method based on built-in reference body Download PDFInfo
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- CN107588854B CN107588854B CN201610535586.0A CN201610535586A CN107588854B CN 107588854 B CN107588854 B CN 107588854B CN 201610535586 A CN201610535586 A CN 201610535586A CN 107588854 B CN107588854 B CN 107588854B
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Abstract
The present invention relates to the temperature field of some physical feelings of measurement for diagnostic purposes, specially a kind of high precision measuring temperature methods based on built-in reference body.A kind of high precision measuring temperature method based on built-in reference body, it is characterized in that: successively implementing as follows: measuring device is arranged in A.；B. environmental factor is determined；C. standard environment is constructed；D. it demarcates；E. final value is determined.The present invention is easy to use, and measurement accuracy is high.
Description
Technical field
It is specially a kind of based on built-in the present invention relates to the temperature field of some physical feelings of measurement for diagnostic purposes
The high precision measuring temperature method of reference body.
Background technique
Infrared thermal imagery system is used to gathering the infra-red radiation that object issues into the detector to sensitive for infrared radiation point by point
Above it is changed into electric signal, electric signal is then amplified and be transformed into digital signal again, the synchronous letter generated in conjunction with sweep mechanism
Number, the infrared radiation images for reconstructing object in computer with gray scale or pseudo-colours are input to, this image reflection is object
Heat distribution state, the sightless temperature information of object just becomes visual image by such infrared thermal imagery system.Human body is also
One heater is not issuing infra-red radiation all the time.Each different parts of human body have different temperature, are issued
The intensity of infra-red radiation is also each different.Infrared thermal imaging technique is applied in clinical medicine domain, is exactly by the temperature of human body
Distribution is shown with image format, thus diagnosis and analysis disease.But currently used thermometric calculation method is based on reason
The accuracy thought the method under working environment, and there is multinomial factor to influence thermometric in real work bad border: the radiance of heat source, away from
From, environment temperature, humidity etc., these factor interactions have a significant impact to temperature-measuring results, reduce temperature measurement accuracy.
Summary of the invention
In order to overcome the drawbacks of the prior art, a kind of thermometry easy to use, measurement accuracy is high, this hair are provided
It is bright to disclose a kind of high precision measuring temperature method based on built-in reference body.
The present invention reaches goal of the invention by following technical solution:
A kind of high precision measuring temperature method based on built-in reference body, the gray scale including measuring the target object to thermometric,
It is characterized in: successively implements as follows:
A. measuring device is arranged: setting target object, built-in reference body, external standard blackbody and measuring device, measurement are set
Standby includes the computer of the focus planar detector of measurement gray scale, the temperature sensor for measuring temperature and processing data, and focal plane is visited
Surveying device includes camera and photoelectric sensor, and the optical signal receiving end of photoelectric sensor is set to the imaging plane of camera gun
On, built-in reference body is set in focus planar detector, and external standard blackbody is set to outside focus planar detector, and built-in reference body is table
The uniform baffle of face temperature, external standard blackbody are the uniform black matrix of controllable fixed temperature, photoelectric sensor and temperature sensing
The electrical signal of both devices all passes through signal wire and connects computer；
B. determine environmental factor: determine influence m environmental factor Y (1) of thermometric accuracy, Y (2) ... Y
(j) ... Y (m), wherein j and m is positive integer and j≤m；
C. construct standard environment: setting each environmental factor Y (j) has a corresponding variable X (j), to each change
It measures X (j) and a standard value X0 (j) is all set, thus one standard environment of building；
D. it demarcates: external standard blackbody being implemented to demarcate, obtains the conversion parameter of measurement temperature, detailed process are as follows:
D.1 calculate initial value: the temperature that external standard blackbody is arranged is definite value, measures built-in ginseng by temperature sensor
The temperature of body is examined, the gray scale of built-in reference body and the gray scale of external standard blackbody are then measured by focus planar detector respectively,
When the temperature definite value for being located at external standard blackbody is T_w, the temperature of built-in reference body, the gray scale of built-in reference body and external are measured
The gray scale of standard blackbody is respectively T_n, G_n and G_w；
Change the temperature T_w of external standard blackbody, obtains the value of N group T_w, G_w, T_n and G_n, if △ G=G_w-G_n,
△ T=T_w-T_n thus obtains the value of N group △ G and △ T, and using △ G as independent variable, △ T is dependent variable, uses least square
The slope k and intercept b of method calculating this N group data of △ G and △ T；
The gray scale G of target object is measured by focus planar detector under standard environment；
Calculate temperature initial value T:T=k (G-G_n)+T_n+b of target object；
D.2 it corrects: being placed in external standard blackbody in standard environment, the temperature that external standard blackbody is arranged is T0, with mark
On the basis of quasi, each environmental factor Y (j) is successively performed the following operations: being changed environmental factor Y (j), acquirement corresponds to
The variable X (j) of environmental factor Y (j) after change calculates difference △ X (j)=X between changing value X (j) and standard value X0 (j)
(j)-X0 (j) is the target object to thermometric with external standard blackbody, external standard blackbody is calculated according to D.1 step
Temperature initial value T (j) after environmental factor Y (j) changes into X (j) calculates difference △ T (j)=T (j)-T0 of T (j) and T0,
To p times different X (j) values that each environmental factor Y (j) takes, so that the value of p group △ X (j) He △ T (j) are obtained, with △ X
It (j) is independent variable, △ T (j) is dependent variable, and the slope K (j) of this p group data of △ X (j) He △ T (j) is calculated with least square method
With intercept B (j), temperature corrected value T_x (j)=K [X of external standard blackbody after environmental factor Y (j) changes into X (j) is calculated
(j)-X0]+B；
E. final value: the temperature T_R=T+T0+ of target object in the actual environment is determined。
The high precision measuring temperature method based on built-in reference body, it is characterized in that: environmental factor includes:
Y (1) --- environment temperature, X (1) value range 283K to 303K；
Y (2) --- the distance of the camera gun of focus planar detector to target object, X (2) value range 0.5m~
10m；
Y (3) --- the relative humidity of target object local environment, X (3) value range 0~100%；
The surface thermal emissivity rate of Y (4) --- target object, X (4) value range 0~100%.
The present invention makes device extension use environment guarantee the accuracy for equally guaranteeing thermometric in the environment of different variations.
The beneficial effects of the present invention are: easy to use, temperature measurement accuracy is high.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
A kind of high precision measuring temperature method based on built-in reference body is successively implemented as follows:
A., measuring device is set: target object 1, built-in reference body 21,22 and of external standard blackbody are set as shown in Figure 1:
Measuring device, measuring device include the focus planar detector 3 for measuring gray scale, the temperature sensor 4 for measuring temperature and processing data
Computer 5, focus planar detector 3 include camera 31 and photoelectric sensor 32, the optical signal receiving end of photoelectric sensor 32
On the imaging plane of 31 camera lens of camera, built-in reference body 21 is set in focus planar detector 3, and external standard blackbody 22 is set
In in focus planar detector 3, built-in reference body 21 is the uniform baffle of surface temperature, and external standard blackbody 22 is controllable fixation
The uniform black matrix of temperature, photoelectric sensor 32 all pass through signal wire with the electrical signal of both temperature sensors 4 and connect
Computer 5；B. determine environmental factor: determine influence m environmental factor Y (1) of thermometric accuracy, Y (2) ... Y
(j) ... Y (m), wherein j and m is positive integer and j≤m,
Environmental factor includes:
Y (1) --- environment temperature, X (1) value range 283K to 303K,
Distance of 31 camera lens of camera of Y (2) --- focus planar detector 3 to target object 1, X (2) value range 0.5m
~10m,
Y (3) --- the relative humidity of 1 local environment of target object, X (3) value range 0~100%,
The surface thermal emissivity rate of Y (4) --- target object 1, X (4) value range 0~100%,
C. construct standard environment: setting each environmental factor Y (j) has a corresponding variable X (j), to each change
It measures X (j) and a standard value X0 (j) is all set, thus one standard environment of building；
D. it demarcates: external standard blackbody 22 being implemented to demarcate, obtains the conversion parameter of measurement temperature, detailed process are as follows:
D.1 calculate initial value: the temperature that external standard blackbody 22 is arranged is definite value, is measured by temperature sensor 4 built-in
The temperature of reference body 21, then by focus planar detector 3 measure respectively built-in reference body 21 gray scale and external standard blackbody
Gray scale, be located at external standard blackbody 22 temperature definite value be T_w when, measure temperature, the built-in reference body of built-in reference body 21
21 gray scale and the gray scale of external standard blackbody are respectively T_n, G_n and G_w；
Change the temperature T_w of external standard blackbody, obtains the value of N group T_w, G_w, T_n and G_n, if △ G=G_w-G_n,
△ T=T_w-T_n thus obtains the value of N group △ G and △ T, and using △ G as independent variable, △ T is dependent variable, uses least square
The slope k and intercept b of method calculating this N group data of △ G and △ T；
The gray scale G of target object 1 is measured by focus planar detector 3 under standard environment；
Calculate temperature initial value T:T=k (G-G_n)+T_n+b of target object 1；
D.2 it corrects: being placed in external standard blackbody 22 in standard environment, the temperature that external standard blackbody 22 is arranged is T0,
On the basis of standard environment, each environmental factor Y (j) is successively performed the following operations: being changed environmental factor Y (j), acquirement pair
The difference △ X between changing value X (j) and standard value X0 (j) should be calculated in the variable X (j) of the environmental factor Y (j) after change
(j)=X (j)-X0 (j) is the target object 1 to thermometric with external standard blackbody 22, calculates according to D.1 step external
Temperature initial value T (j) of the standard blackbody 22 after environmental factor Y (j) changes into X (j) calculates the difference △ T (j) of T (j) and T0
=T (j)-T0, to p times different X (j) values that each environmental factor Y (j) takes, to obtain p group △ X (j) and △ T (j)
Value, with △ X (j) for independent variable, △ T (j) is dependent variable, calculates △ X (j) and this p group data of △ T (j) with least square method
Slope K (j) and intercept B (j), calculate after environmental factor Y (j) changes into X (j) external standard blackbody 22 temperature corrected value
T_x(j)=K[X(j)-X0]+B；
E. final value: the temperature T_R=T+T0+ of target object 1 in the actual environment is determined。
Claims (2)
1. a kind of high precision measuring temperature method based on built-in reference body, the gray scale including measuring the target object (1) to thermometric,
It is characterized in: successively implements as follows:
A. measuring device is arranged: setting target object (1), built-in reference body (21), external standard blackbody (22) and measurement are set
Standby, measuring device includes the focus planar detector (3) for measuring gray scale, the temperature sensor (4) for measuring temperature and processing data
Computer (5), focus planar detector (3) include camera (31) and photoelectric sensor (32), the light letter of photoelectric sensor (32)
Number receiving end is set on the imaging plane of camera (31) camera lens, and built-in reference body (21) is set in focus planar detector (3), outside
It sets standard blackbody (22) and is set to focus planar detector (3) outside, the telecommunications of photoelectric sensor (32) and temperature sensor (4) the two
Number output end all passes through signal wire connection computer (5)；
B. determine environmental factor: determine influence m environmental factor Y (1) of thermometric accuracy, Y (2) ... Y (j) ... Y
(m), wherein j and m is positive integer and j≤m；
C. construct standard environment: setting each environmental factor Y (j) has a corresponding variable X (j), to each variable X
(j) a standard value X0 (j) is all set, thus one standard environment of building；
D. it demarcates: external standard blackbody (22) being implemented to demarcate, obtain the conversion parameter of measurement temperature, detailed process are as follows:
D.1 calculate initial value: the temperature that external standard blackbody (22) is arranged is definite value, is measured by temperature sensor (4) built-in
The temperature of reference body (21) then passes through focus planar detector (3) gray scale of measurement built-in reference body (21) and external mark respectively
The gray scale of quasi- black matrix, be located at external standard blackbody (22) temperature definite value be T_w when, measure built-in reference body (21) temperature,
The gray scale of built-in reference body (21) and the gray scale of external standard blackbody are respectively T_n, G_n and G_w；
Change the temperature T_w of external standard blackbody, obtains the value of N group T_w, G_w, T_n and G_n, if △ G=G_w-G_n, △ T=
T_w-T_n thus obtains the value of N group △ G and △ T, and using △ G as independent variable, △ T is dependent variable, with least square method meter
Calculate the slope k and intercept b of this N group data of △ G and △ T；
The gray scale G of target object (1) is measured by focus planar detector (3) under standard environment；
Calculate temperature initial value T:T=k (the G-G_n)+T_n+b of target object (1)；
D.2 it corrects: being placed in external standard blackbody (22) in standard environment, the temperature that external standard blackbody (22) is arranged is T0,
On the basis of standard environment, each environmental factor Y (j) is successively performed the following operations: being changed environmental factor Y (j), acquirement pair
The difference △ X between changing value X (j) and standard value X0 (j) should be calculated in the variable X (j) of the environmental factor Y (j) after change
(j)=X (j)-X0 (j) is the target object (1) to thermometric with external standard blackbody (22), calculates according to D.1 step
Temperature initial value T (j) of the external standard blackbody (22) after environmental factor Y (j) changes into X (j) calculates the difference of T (j) and T0
△ T (j)=T (j)-T0, to p times different X (j) values that each environmental factor Y (j) takes, thus obtain p group △ X (j) and
The value of △ T (j), with △ X (j) for independent variable, △ T (j) is dependent variable, calculates △ X (j) and this p of △ T (j) with least square method
The slope K (j) and intercept B (j) of group data, calculate the temperature of the external standard blackbody (22) after environmental factor Y (j) changes into X (j)
Spend correction value T_x (j)=K [X (j)-X0]+B；
E. final value: the temperature T_R=T+T0+ of target object (1) in the actual environment is determined。
2. as described in claim 1 based on the high precision measuring temperature method of built-in reference body, it is characterized in that: environmental factor includes:
Y (1) --- environment temperature, X (1) value range 283K to 303K；
Distance of camera (31) camera lens of Y (2) --- focus planar detector (3) to target object (1), X (2) value range
0.5m~10m；
Y (3) --- the relative humidity of target object (1) local environment, X (3) value range 0~100%；
Y (4) --- the surface thermal emissivity rate of target object (1), X (4) value range 0~100%.
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| CN110793635B (en) * | 2019-10-10 | 2020-10-23 | 深圳市景阳信息技术有限公司 | Thermal imaging temperature measurement method and device and terminal equipment |
| CN113405664B (en) * | 2020-03-16 | 2022-09-02 | 杭州海康威视数字技术股份有限公司 | Temperature measurement method, temperature measurement equipment and machine-readable storage medium |
| CN111366247A (en) * | 2020-03-19 | 2020-07-03 | 烟台艾睿光电科技有限公司 | Infrared temperature measurement thermal image device and real-time temperature measurement calibration method thereof |
| CN111307299A (en) * | 2020-04-17 | 2020-06-19 | 烟台艾睿光电科技有限公司 | Infrared temperature measurement method and infrared temperature measurement thermal imager |
| CN111579081B (en) * | 2020-04-30 | 2021-12-21 | 烟台艾睿光电科技有限公司 | Infrared temperature measurement method, device and equipment |
| CN111721425B (en) * | 2020-06-29 | 2022-08-05 | 烟台艾睿光电科技有限公司 | Infrared temperature measurement method, device, equipment and computer readable storage medium |
| CN111780879B (en) * | 2020-07-22 | 2021-07-02 | 武汉博宇光电系统有限责任公司 | Infrared temperature measurement system and temperature measurement method |
| CN112556856B (en) * | 2020-11-16 | 2022-04-05 | 烟台艾睿光电科技有限公司 | Infrared temperature measurement correction method and device and electronic equipment |
| CN113470818A (en) * | 2021-07-08 | 2021-10-01 | 建信金融科技有限责任公司 | Disease prediction method, device, system, electronic device and computer readable medium |
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