CN111609940B - Infrared temperature measurement method - Google Patents
Infrared temperature measurement method Download PDFInfo
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- CN111609940B CN111609940B CN202010577949.3A CN202010577949A CN111609940B CN 111609940 B CN111609940 B CN 111609940B CN 202010577949 A CN202010577949 A CN 202010577949A CN 111609940 B CN111609940 B CN 111609940B
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 57
- 239000000523 sample Substances 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 abstract description 11
- 230000036760 body temperature Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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
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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
- G01J5/48—Thermography; Techniques using wholly visual means
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Abstract
The invention relates to an infrared temperature measurement method, which comprises the following steps: setting a central infrared temperature measuring point, and setting N peripheral infrared temperature measuring points by taking the central infrared temperature measuring point as a center; acquiring the temperature difference measured by the nth peripheral infrared temperature measuring point and the central infrared temperature measuring point, and recording the temperature difference as the nth temperature difference, wherein N belongs to [1,2, …, N ]; acquiring the distance between the nth peripheral measured point and the central measured point, and recording as the nth distance; determining an nth temperature gradient according to the nth temperature difference and the nth distance; obtaining the gradient difference value of the maximum temperature gradient and the minimum temperature gradient in all the temperature gradients; judging whether the gradient difference value is smaller than a set threshold value or not; if so, taking the temperature measured by the central infrared temperature measuring point as the test temperature; if not, the central infrared temperature measuring point and each peripheral infrared temperature measuring point are moved simultaneously, and the temperature difference is recalculated. The invention can quickly avoid the place with abnormal temperature to obtain stable temperature data, thereby improving the accuracy of temperature measurement.
Description
Technical Field
The invention relates to the technical field of temperature measurement, in particular to an infrared temperature measurement method.
Background
At present, when the infrared thermometer is used for measuring the body temperature, the body temperature of the face is affected by the external environment, for example, the temperatures of the cheek and the forehead are often low, the temperature measurement is inaccurate due to the abnormal temperature caused by the external environment, or the repeated measurement is needed for many times, so that the efficiency is affected.
When the infrared temperature measurement is used for measuring the temperature of the surface of an industrial field, a large amount of data needs to be measured, local temperature abnormal points are quite common, and the abnormal points are difficult to eliminate under the condition of no indication.
Disclosure of Invention
Based on the above, the invention aims to provide an infrared temperature measurement method, which can quickly avoid places with abnormal temperature to obtain stable temperature data, thereby improving the accuracy of temperature measurement.
In order to achieve the purpose, the invention provides the following scheme:
an infrared temperature measurement method comprises the following steps:
setting a central infrared temperature measuring point, setting N peripheral infrared temperature measuring points by taking the central infrared temperature measuring point as a center, wherein N is a positive integer greater than 2, and the central infrared temperature measuring point and each peripheral infrared temperature measuring point are points emitting infrared rays;
acquiring the temperature difference measured by the nth peripheral infrared temperature measuring point and the central infrared temperature measuring point, and recording the temperature difference as the nth temperature difference, wherein N belongs to [1,2, …, N ];
recording the measured point corresponding to the nth peripheral infrared temperature measurement point as an nth peripheral measured point;
recording the measured point corresponding to the central infrared temperature measurement point as a central measured point;
acquiring the distance between the nth peripheral measured point and the central measured point, and recording as the nth distance;
determining an nth temperature gradient according to the nth temperature difference and the nth distance;
obtaining a gradient difference value of the maximum temperature gradient and the minimum temperature gradient in each temperature gradient;
judging whether the gradient difference value is smaller than a set threshold value or not;
if so, taking the temperature measured by the central infrared temperature measuring point as a test temperature;
if not, the central infrared temperature measuring point and each peripheral infrared temperature measuring point are moved simultaneously, and the step is returned to obtain the temperature difference between the nth peripheral infrared temperature measuring point and the central infrared temperature measuring point and is recorded as the nth temperature difference, and N belongs to [1,2, …, N ] ".
Optionally, the moving the central infrared temperature measurement point and each of the peripheral infrared temperature measurement points simultaneously specifically includes:
and the central infrared temperature measuring point and each peripheral infrared temperature measuring point simultaneously move along the direction of the peripheral infrared temperature measuring point corresponding to the maximum temperature gradient.
Optionally, the central infrared temperature measuring point and the peripheral infrared temperature measuring point are both infrared temperature measuring probes.
Optionally, each infrared temperature measurement probe is connected to a display screen, and the display screen displays the moving direction of each infrared temperature measurement probe.
Optionally, the distances between the peripheral infrared temperature measurement points and the central infrared temperature measurement point are equal.
Optionally, the number of the peripheral infrared temperature measuring points is 4.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides an infrared temperature measuring method, which is characterized in that a central infrared temperature measuring point is arranged, N peripheral infrared temperature measuring points are arranged by taking the central infrared temperature measuring point as a center, and local abnormal temperature points are quickly avoided through a plurality of temperature measuring points, so that the accuracy of temperature measurement is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic flow chart of an infrared temperature measurement method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a central infrared measuring point and a peripheral infrared measuring point respectively in the embodiment of the invention;
FIG. 3 is a schematic diagram of the distance between the central measured point and the peripheral measured points when the measured surface is a curved surface according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an infrared temperature measurement method, which can quickly avoid places with abnormal temperature to obtain stable temperature data, thereby improving the accuracy of temperature measurement.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic flow chart of an infrared temperature measurement method, as shown in fig. 1, the method includes:
step 101: setting a central infrared temperature measuring point, setting N peripheral infrared temperature measuring points which are respectively a No. 1 peripheral infrared temperature measuring point, a No. 2 peripheral infrared temperature measuring point, … … and an Nth peripheral infrared temperature measuring point by taking the central infrared temperature measuring point as a center, wherein N is a positive integer larger than 2, and the central infrared temperature measuring point and each peripheral infrared temperature measuring point are points for emitting infrared rays.
And the distances between the peripheral infrared temperature measuring points and the central infrared temperature measuring point are equal to d.
Step 102: and acquiring the temperature difference measured by the nth peripheral infrared temperature measuring point and the central infrared temperature measuring point, and recording the temperature difference as the nth temperature difference, wherein N belongs to [1,2, …, N ].
Step 103: and recording the measured point corresponding to the nth peripheral infrared temperature measurement point as the nth peripheral measured point.
Step 104: and recording the measured point corresponding to the central infrared temperature measurement point as a central measured point.
Step 105: and acquiring the distance between the nth peripheral measured point and the central measured point, and recording as the nth distance.
Step 106: an nth temperature gradient is determined based on the nth temperature difference and the nth distance.
Step 107: and obtaining the gradient difference value of the maximum temperature gradient and the minimum temperature gradient in each temperature gradient.
Step 108: and judging whether the gradient difference value is smaller than a set threshold value.
If yes, go to step 109.
Step 109: and taking the temperature measured by the central infrared temperature measuring point as a test temperature.
If not, go to step 110 and return to step 102.
Step 110: and simultaneously moving the central infrared temperature measuring point and each peripheral infrared temperature measuring point.
Wherein, step 110 specifically includes:
the central infrared temperature measuring point and each peripheral infrared temperature measuring point simultaneously move along the direction of the peripheral infrared temperature measuring point corresponding to the maximum temperature gradient, the temperature obtained by the peripheral infrared temperature measuring point corresponding to the maximum temperature gradient is the most abnormal temperature, and the local abnormal temperature point can be avoided by moving along the direction of the peripheral infrared temperature measuring point corresponding to the maximum temperature gradient, so that the influence of the local abnormal temperature point on the test temperature is reduced.
The central infrared temperature measuring point and the peripheral infrared temperature measuring points are both infrared temperature measuring probes.
And each infrared temperature measuring probe is respectively connected with a display screen, and the display screen displays the moving direction of each infrared temperature measuring probe.
The number of the peripheral infrared temperature measuring points is 4, as shown in figure 2, the central infrared temperature measuring point is T0Four peripheral infrared temperature measuring points are respectively T1、T2、T3And T4，T1、T2、T3And T4Are respectively arranged at T0Up, down, left and right directions, T0、T1、T2、T3And T4The four temperature measuring points are positioned in the same plane and mainly used for providing temperatures in four main directions.
Temperature gradient dt when the measured surface is a planen＝δn/d(n＝1、2、3、4)，δn＝Tn-T0. When the measured surface is a curved surface, the distance between the temperature measurement point and the central point in each direction on the temperature measurement surface is obtained by adopting the pythagorean theorem and the idea of replacing curve with straight curve, as shown in FIG. 3, the peripheral infrared temperature measurement point T1The corresponding measured point is X1，T1And X1A distance d between1Central infrared temperature measuring point T0Corresponding measuredPoint is X0，T0And X0A distance d between0At this time, the distance from the center point in the calculation of the temperature gradient
Temperature gradient dtn＝δn/d'(n＝1、2、3、4)。
The invention provides an infrared temperature measurement method, which can obtain the temperature change rate in each direction by adding four temperature measurement points, namely an upper temperature measurement point, a lower temperature measurement point, a left temperature measurement point, a right temperature measurement point and a left temperature measurement point, can quickly avoid the places with abnormal temperature, and can obtain stable temperature data required to be obtained, thereby improving the accuracy of temperature measurement.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. An infrared temperature measurement method is characterized by comprising the following steps:
setting a central infrared temperature measuring point, setting N peripheral infrared temperature measuring points by taking the central infrared temperature measuring point as a center, wherein N is a positive integer greater than 2, and the central infrared temperature measuring point and each peripheral infrared temperature measuring point are points emitting infrared rays;
acquiring the temperature difference measured by the nth peripheral infrared temperature measuring point and the central infrared temperature measuring point, and recording the temperature difference as the nth temperature difference, wherein N belongs to [1,2, …, N ];
recording the measured point corresponding to the nth peripheral infrared temperature measurement point as an nth peripheral measured point;
recording the measured point corresponding to the central infrared temperature measurement point as a central measured point;
acquiring the distance between the nth peripheral measured point and the central measured point, and recording as the nth distance;
determining an nth temperature gradient according to the nth temperature difference and the nth distance;
obtaining a gradient difference value of the maximum temperature gradient and the minimum temperature gradient in each temperature gradient;
judging whether the gradient difference value is smaller than a set threshold value or not;
if so, taking the temperature measured by the central infrared temperature measuring point as a test temperature;
if not, simultaneously moving the central infrared temperature measuring point and each peripheral infrared temperature measuring point, and returning to the step of obtaining the temperature difference measured by the nth peripheral infrared temperature measuring point and the central infrared temperature measuring point, and recording the temperature difference as nth temperature difference, wherein N belongs to [1,2, …, N ];
the simultaneously moving the central infrared temperature measuring point and each peripheral infrared temperature measuring point specifically comprises:
and the central infrared temperature measuring point and each peripheral infrared temperature measuring point simultaneously move along the direction of the peripheral infrared temperature measuring point corresponding to the maximum temperature gradient.
2. The infrared temperature measurement method according to claim 1, wherein the central infrared temperature measurement point and the peripheral infrared temperature measurement points are both infrared temperature measurement probes.
3. The infrared temperature measurement method according to claim 2, wherein each of the infrared temperature measurement probes is connected to a display screen, and the display screen displays a moving direction of each of the infrared temperature measurement probes.
4. The infrared temperature measurement method of claim 1, wherein distances between each of the peripheral infrared temperature measurement points and the central infrared temperature measurement point are equal.
5. The infrared temperature measurement method according to claim 1, wherein the number of the peripheral infrared temperature measurement points is 4.
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| CN109100022A (en) * | 2018-07-23 | 2018-12-28 | 清华大学 | Temp measuring method and system |
| CN110426613A (en) * | 2019-08-22 | 2019-11-08 | 南方电网科学研究院有限责任公司 | Method and device for judging overheating fault inside GIS device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010124665A1 (en) * | 2009-04-30 | 2010-11-04 | Siemens Aktiengesellschaft | Apparatus and temperature measurement unit for the contactless measurement and transmission of temperatures by temperature-sensing parts and use of such an apparatus |
| CN111207838B (en) * | 2020-03-11 | 2021-02-19 | 中南大学 | Molten iron temperature measuring device based on special infrared spectrum wave band |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012114919A1 (en) * | 2011-02-24 | 2012-08-30 | 財団法人大分県産業創造機構 | Iron loss distribution measurement device |
| CN207180897U (en) * | 2017-08-14 | 2018-04-03 | 潍柴动力股份有限公司 | A kind of measurement apparatus for being used to measure engine cylinder cover fire power face thermograde |
| CN109100022A (en) * | 2018-07-23 | 2018-12-28 | 清华大学 | Temp measuring method and system |
| CN110426613A (en) * | 2019-08-22 | 2019-11-08 | 南方电网科学研究院有限责任公司 | Method and device for judging overheating fault inside GIS device |
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