CN111579081B - Infrared temperature measurement method, device and equipment - Google Patents
Infrared temperature measurement method, device and equipment Download PDFInfo
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 46
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- 238000004861 thermometry Methods 0.000 claims description 6
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- 230000036760 body temperature Effects 0.000 description 3
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- G—PHYSICS
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- 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
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
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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
- G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
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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
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
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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
- G01J5/80—Calibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/20—Clinical contact thermometers for use with humans or animals
- G01K13/223—Infrared clinical thermometers, e.g. tympanic
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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
- G01J2005/0077—Imaging
Abstract
The invention discloses an infrared temperature measurement method, which comprises the steps of obtaining a first gray parameter, a second gray parameter and a target gray parameter; acquiring a first temperature parameter and a second temperature parameter; obtaining the response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter; obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter; and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter. According to the invention, the problems that long-time waiting is required after starting up until the system temperature is stable and reaches thermal balance with the external environment are solved by acquiring the temperature values of the two constant-temperature reference assemblies and the output gray values of the infrared rays, and the rapid and accurate infrared temperature measurement at different environmental temperatures is realized. The invention also provides an infrared temperature measuring device and equipment with the advantages.
Description
Technical Field
The invention relates to the field of infrared temperature measurement, in particular to an infrared temperature measurement method, device and equipment.
Background
Any object with a temperature above absolute zero (-273.15 c) emits infrared radiation (thermal radiation) without stopping. The infrared radiation is an electromagnetic wave, the wavelength range is 0.7-1000 mu m, the infrared radiation cannot be seen by human eyes, and the wavelength of the external radiation is different at different temperatures. After the infrared thermal imaging system captures the infrared radiation, the infrared thermal imaging system converts the infrared radiation into an electric signal, and the temperature information is finally output after algorithm processing. And calculating according to the corresponding change to obtain corresponding temperature information.
However, the infrared temperature measurement thermal imaging system is very easily influenced by environmental factors such as environmental temperature and humidity to cause output data drift, and the influence of output stability and nonlinearity of devices is finally expressed as low and unstable temperature measurement data precision, so that much trouble is caused for the practical application of infrared temperature measurement. The most significant influence among the above is the temperature change of the equipment caused by the temperature in the infrared temperature measurement and the working time of the equipment, and because the gray value change of the infrared radiation caused by the temperature change at every temperature is different, the infrared thermometer needs to wait for the equipment to be fully heat balanced with the environment in actual use, so that the equipment can be accurately measured in temperature, which means that the equipment can be normally used after waiting for a long time after being started, meanwhile, the constant temperature reference object needs to be measured and calibrated at different environmental temperatures for a long time in advance, and a strict environmental temperature needs to be set before the equipment starts to work to obtain an accurate result, and once the actual environmental temperature is deviated from the set environmental temperature, the measured result has a large error.
Therefore, how to find an infrared temperature measurement method which does not need to perform temperature measurement calibration in advance and is not affected by the ambient temperature to obtain accurate measured temperature is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide an infrared temperature measurement method, an infrared temperature measurement device and infrared temperature measurement equipment, and aims to solve the problems that in the prior art, temperature measurement calibration needs to be carried out in advance, and the measurement accuracy is greatly reduced after the environmental temperature changes.
In order to solve the technical problem, the invention provides an infrared temperature measurement method, which comprises the following steps:
acquiring an output gray value of an infrared signal of a first constant temperature reference assembly, an output gray value of an infrared signal of a second constant temperature reference assembly and an output gray value of an infrared signal of a target to be detected as a first gray parameter, a second gray parameter and a target gray parameter respectively;
acquiring a temperature value of the first constant-temperature reference assembly and a temperature value of the second constant-temperature reference assembly, and respectively taking the temperature values as a first temperature parameter and a second temperature parameter;
obtaining the response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter;
obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter;
and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter.
Optionally, in the infrared temperature measurement method, when distances between the first constant temperature reference assembly, the second constant temperature reference assembly, and the target to be measured and the infrared sensor are different, a process of obtaining the relative temperature difference specifically includes:
acquiring a difference between the distance from the first constant temperature reference assembly to the infrared sensor and the distance from the second constant temperature reference assembly to the infrared sensor as a first distance difference value;
acquiring the difference between the distance from the target to be detected to the infrared sensor and the distance from the second constant-temperature reference assembly to the infrared sensor as a target distance difference value;
obtaining a first calibration gray scale parameter through machine learning by taking the first distance difference value and the first gray scale parameter as input values, and obtaining a target calibration gray scale parameter through machine learning by taking the target distance difference value and the target gray scale parameter as input values;
correspondingly, the obtaining of the response rate of the infrared sensor by using the first gray scale parameter, the second gray scale parameter, the first temperature parameter and the second temperature parameter specifically includes:
obtaining the response rate of the infrared sensor by using the first calibration gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter;
correspondingly, the obtaining of the relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter specifically comprises:
and obtaining a relative temperature difference value through the response rate, the first calibration gray scale parameter and the target gray scale parameter.
Optionally, in the infrared temperature measurement method, after obtaining the temperature value of the target to be measured, the method further includes:
and determining the corresponding internal temperature of the target to be detected according to the temperature value.
An infrared temperature measuring device, comprising:
the gray level acquisition module is used for acquiring an output gray level value of the infrared signal of the first constant temperature reference assembly, an output gray level value of the infrared signal of the second constant temperature reference assembly and an output gray level value of the infrared signal of the target to be detected as a first gray level parameter, a second gray level parameter and a target gray level parameter respectively;
the temperature acquisition module is used for acquiring the temperature value of the first constant-temperature reference assembly and the temperature value of the second constant-temperature reference assembly as a first temperature parameter and a second temperature parameter respectively;
the response rate calculation module is used for obtaining the response rate of the infrared sensor by utilizing the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter;
the difference module is used for obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter;
and the temperature determining module is used for obtaining the temperature value of the target to be measured through the relative temperature difference value and the first temperature parameter.
An infrared temperature measurement device comprises a monitoring end and a reference end, wherein the monitoring end and the reference end are arranged separately;
the monitoring end comprises a processor, an infrared sensor and an optical lens;
the reference end comprises a first constant temperature reference component and a second constant temperature reference component;
the reference end and the target to be detected are positioned in the field of view of the optical lens;
the first constant temperature reference assembly comprises a first temperature sensor for measuring a temperature value of the first constant temperature reference assembly; the second constant temperature reference assembly comprises a second temperature sensor, and the second temperature sensor is used for measuring the temperature value of the second constant temperature reference assembly;
the infrared sensor is used for determining an output gray value of the infrared rays emitted by the first constant temperature reference assembly, an output gray value of the infrared rays emitted by the second constant temperature reference assembly and an output gray value of the infrared rays emitted by the target to be detected;
the processor is used for executing the steps of the infrared thermometry method according to any one of claims 1 to 3.
Optionally, in the infrared thermometry equipment, the distance from the first constant temperature reference assembly to the infrared sensor is the same as the distance from the second constant temperature reference assembly to the infrared sensor.
Optionally, in the infrared temperature measurement device, the first constant temperature reference assembly is disposed inside the monitoring end.
Optionally, in the infrared temperature measurement device, when the infrared ray of the first constant temperature reference assembly can be directly received by the infrared sensor, and the infrared ray of the target to be measured and the infrared ray of the second constant temperature reference assembly need to be received by the infrared sensor through the optical lens of the monitoring end, the monitoring end further includes:
and the lens corrector is used for correcting the first gray parameter through the energy attenuation coefficient of the optical lens so that the first gray parameter is a gray parameter subjected to energy attenuation of the optical lens.
Optionally, in the infrared temperature measurement device, the fixed transmission frequency of the first constant temperature reference assembly is the same as the fixed transmission frequency of the second constant temperature reference assembly.
Optionally, in the infrared temperature measurement device, the fixed emissivity of the first constant temperature reference assembly and the second constant temperature reference assembly is 0.98.
According to the infrared temperature measurement method provided by the invention, the output gray value of the infrared signal of the first constant temperature reference assembly, the output gray value of the infrared signal of the second constant temperature reference assembly and the output gray value of the infrared signal of the target to be measured are obtained and respectively used as a first gray parameter, a second gray parameter and a target gray parameter; acquiring a temperature value of the first constant-temperature reference assembly and a temperature value of the second constant-temperature reference assembly, and respectively taking the temperature values as a first temperature parameter and a second temperature parameter; obtaining the response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter; obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter; and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter. According to the invention, the change condition (namely the reciprocal of the response rate) of the output gray level value of one degree per liter under the current environment (including the current environment temperature, the current humidity, the working temperature of a device and other factors) is calculated by obtaining the temperature values of the two constant-temperature reference assemblies and the output gray level value of the infrared ray, so that the problem that long-time waiting is required after starting up until the system temperature is stable and the system temperature reaches thermal balance with the external environment in order to ensure that the ratio of the output gray level value of the infrared ray and the temperature of the measured target meets the ratio under the preset temperature is solved, and the temperature calibration under different environments for a long time before measurement is not required because the ratio of the output gray level value change under the specific environment temperature and the object temperature change does not need to be calculated in advance, and the rapid and accurate infrared temperature measurement under different environment temperatures is realized. The invention also provides an infrared temperature measuring device and equipment with the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art 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 that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of an embodiment of an infrared temperature measurement method provided by the present invention;
FIG. 2 is a schematic flow chart of another embodiment of the infrared temperature measurement method provided by the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of an infrared temperature measuring device according to the present invention;
FIG. 4 is a schematic structural diagram of an embodiment of an infrared temperature measurement device provided by the present invention;
fig. 5 is a schematic structural diagram of another specific embodiment of the infrared temperature measurement device provided by the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 core of the invention is to provide an infrared temperature measurement method, a flow diagram of a specific implementation way of which is shown in figure 1, comprising the following steps:
step S101: and acquiring an output gray value of the infrared signal of the first constant temperature reference assembly, an output gray value of the infrared signal of the second constant temperature reference assembly and an output gray value of the infrared signal of the target to be detected as a first gray parameter, a second gray parameter and a target gray parameter respectively.
Step S102: and acquiring the temperature value of the first constant-temperature reference assembly and the temperature value of the second constant-temperature reference assembly as a first temperature parameter and a second temperature parameter respectively.
The steps S101 and S102 do not have a necessary precedence relationship, and can be exchanged successively according to actual conditions.
Step S103: and obtaining the response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter.
The specific obtaining method of the response rate is that the response rate of the infrared sensor is obtained by dividing the difference value of the first gray scale parameter and the second gray scale parameter by the difference value of the first temperature parameter and the second temperature parameter;
the response rate indicates the variation of the infrared gray scale parameter received by the infrared sensor when the object emitting infrared radiation changes by one degree centigrade at a certain environmental temperature.
Step S104: and obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter.
The specific evaluation method of the relative temperature difference is that the difference value of the target gray scale parameter and the first gray scale parameter is divided by the response rate to obtain the relative temperature difference value;
the relative temperature difference refers to a difference between the temperature of the target to be measured and the temperature of the first constant temperature reference assembly, and of course, a second gray parameter may be selected for calculation, and the relative temperature difference refers to a difference between the temperature of the target to be measured and the temperature of the second constant temperature reference assembly.
Step S105: and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter.
The specific method is that the relative temperature difference value is added with the first temperature parameter to obtain the temperature value of the target to be measured
Still further, after obtaining the temperature value of the target to be measured, the method further includes:
and determining the corresponding internal temperature of the target to be detected according to the temperature value. On the basis of obtaining the surface temperature of the target to be detected, the temperature value is further simply converted according to a preset temperature relation to obtain the internal temperature, which is very effective in monitoring the body temperature of a human body, namely the forehead temperature (which is equivalent to the temperature value in the invention) of the exposed human body is converted into the armpit temperature or the oral temperature or the rectal temperature (which is equivalent to the internal temperature in the invention) which are more commonly used, so that the usability is increased and the screening success rate is increased in the screening process of the body temperature of the human body.
Furthermore, when the measured temperature value is higher than the preset alarm threshold value, alarm information can be sent to the alarm device, so that the alarm device sends out a corresponding alarm prompt.
According to the infrared temperature measurement method provided by the invention, the output gray value of the infrared signal of the first constant temperature reference assembly, the output gray value of the infrared signal of the second constant temperature reference assembly and the output gray value of the infrared signal of the target to be measured are obtained and respectively used as a first gray parameter, a second gray parameter and a target gray parameter; acquiring a temperature value of the first constant-temperature reference assembly and a temperature value of the second constant-temperature reference assembly, and respectively taking the temperature values as a first temperature parameter and a second temperature parameter; obtaining the response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter; obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter; and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter. According to the invention, the change condition (namely the reciprocal of the response rate) of the output gray level value of one degree per liter under the current environment (including the current environment temperature, the current humidity, the working temperature of a device and other factors) is calculated by obtaining the temperature values of the two constant-temperature reference assemblies and the output gray level value of the infrared ray, so that the problem that long-time waiting is required after starting up until the system temperature is stable and the system temperature reaches thermal balance with the external environment in order to ensure that the ratio of the output gray level value of the infrared ray and the temperature of the measured target meets the ratio under the preset temperature is solved, and the temperature calibration under different environments for a long time before measurement is not required because the ratio of the output gray level value change under the specific environment temperature and the object temperature change does not need to be calculated in advance, and the rapid and accurate infrared temperature measurement under different environment temperatures is realized.
On the basis of the first specific embodiment, it is further assumed that the distances from the first constant temperature reference assembly, the second constant temperature reference assembly, and the target to be measured to the infrared sensor are different, and corresponding optimization is performed, which is called as a second specific embodiment, and a flow diagram of the second specific embodiment is shown in fig. 2, and includes:
step S201: and acquiring an output gray value of the infrared signal of the first constant temperature reference assembly, an output gray value of the infrared signal of the second constant temperature reference assembly and an output gray value of the infrared signal of the target to be detected as a first gray parameter, a second gray parameter and a target gray parameter respectively.
Step S202: and acquiring the temperature value of the first constant-temperature reference assembly and the temperature value of the second constant-temperature reference assembly as a first temperature parameter and a second temperature parameter respectively.
Step S203: and acquiring the difference between the distance from the first constant temperature reference assembly to the infrared sensor and the distance from the second constant temperature reference assembly to the infrared sensor as a first distance difference value.
Step S204: and acquiring the difference between the distance from the target to be detected to the infrared sensor and the distance from the second constant-temperature reference assembly to the infrared sensor as a target distance difference value.
As in the first embodiment, the first four steps S101, S102, S103 and S104 have no fixed sequence, and may be adjusted according to actual situations.
In this embodiment, the second constant temperature reference assembly is used as a center, and the distance difference is calculated by the distance difference between the first constant temperature reference assembly and the target to be measured and the second constant temperature reference assembly, but in an actual situation, the first constant temperature reference assembly or the target to be measured may be used as a center.
Step S205: and obtaining a first calibration gray scale parameter through machine learning by taking the first distance difference value and the first gray scale parameter as input values, and obtaining a target calibration gray scale parameter through machine learning by taking the target distance difference value and the target gray scale parameter as input values.
Step S206: and obtaining the response rate of the infrared sensor by using the first calibration gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter.
Step S207: and obtaining a relative temperature difference value through the response rate, the first calibration gray scale parameter and the target gray scale parameter.
Step S208: and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter.
The difference between this embodiment and the above embodiment is that, in this embodiment, calibration is performed on each gray scale parameter for the case where distances from the first constant temperature reference assembly, the second constant temperature reference assembly, and the target to be measured to the infrared sensor are different, and the remaining steps are the same as those in the above embodiments, and are not described herein again.
In this embodiment, in consideration of the fact that the distances from the first constant temperature reference assembly, the second constant temperature reference assembly, and the target to be detected to the infrared sensor are different, in this case, the propagation distances of the infrared rays emitted by the three assemblies are different, so that the loss in the atmosphere is different, and the obtained corresponding gray values have errors.
The relationship between the gray value and the distance change obtained by machine learning is explained simply, a first constant temperature reference constant temperature unit with fixed emissivity is arranged at a fixed distance from an optical lens, a second constant temperature reference assembly is arranged in the field range of the infrared thermometric thermal imaging system, the temperature T _ black of the first constant temperature reference constant temperature unit is set as a reference, and an operator circles the position of the first constant temperature reference constant temperature unit by adopting a polygon or a circle according to the position of the first constant temperature reference constant temperature unit in imaging. Adjusting the second constant temperature reference assembly to a temperature T1, moving the second constant temperature reference assembly to a distance sensor D1 and a distance sensor D2.. Dn respectively, and recording primary processing output values Cout1_ T1 and Cout2_ T1.. Coutn _ T1; adjusting the second constant temperature reference assembly to a temperature T2, moving the standard blackbody target to a distance sensor D1 and a distance sensor D2.. Dn respectively, and recording primary processing output values Cout1_ T2 and Cout2_ T2.. Coutn _ T2; .., adjusting the second constant temperature reference assembly to a temperature Tn, moving the second constant temperature reference assembly to a distance sensor D1 and a distance sensor D2.. Dn respectively, and recording the primary processing output values Cout1_ Tn and Cout2_ Tn.. Coutn _ Tn; the distance temperature relation formula T = f (Cout, D) is obtained by using a deep learning method (which may be a neural network algorithm) (n is a positive integer greater than 0 in the present application).
In the following, the infrared temperature measuring device provided by the embodiment of the present invention is introduced, and the infrared temperature measuring device described below and the infrared temperature measuring method described above may be referred to correspondingly.
Fig. 3 is a block diagram of an infrared temperature measuring device according to an embodiment of the present invention, which is referred to as a third embodiment, and referring to fig. 3, the infrared temperature measuring device may include:
the gray level obtaining module 100 is configured to obtain an output gray level value of an infrared signal of the first constant temperature reference assembly, an output gray level value of an infrared signal of the second constant temperature reference assembly, and an output gray level value of an infrared signal of a target to be detected, and respectively use the output gray level values as a first gray level parameter, a second gray level parameter, and a target gray level parameter;
a temperature obtaining module 200, configured to obtain a temperature value of the first constant temperature reference component and a temperature value of the second constant temperature reference component as a first temperature parameter and a second temperature parameter, respectively;
a response rate calculating module 300, configured to obtain a response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter, and the second temperature parameter;
a difference module 400, configured to obtain a relative temperature difference according to the response rate, the first gray scale parameter, and the target gray scale parameter;
and the temperature determining module 500 is configured to obtain the target temperature value to be measured according to the relative temperature difference and the first temperature parameter.
The infrared temperature measuring device comprises a gray level obtaining module, a gray level obtaining module and a gray level determining module, wherein the gray level obtaining module is used for obtaining an output gray level value of an infrared signal of a first constant temperature reference assembly, an output gray level value of an infrared signal of a second constant temperature reference assembly and an output gray level value of an infrared signal of a target to be measured, and the output gray level values are respectively used as a first gray level parameter, a second gray level parameter and a target gray level parameter; the temperature acquisition module is used for acquiring the temperature value of the first constant-temperature reference assembly and the temperature value of the second constant-temperature reference assembly as a first temperature parameter and a second temperature parameter respectively; the response rate calculation module is used for obtaining the response rate of the infrared sensor by utilizing the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter; the difference module is used for obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter; and the temperature determining module is used for obtaining the temperature value of the target to be measured through the relative temperature difference value and the first temperature parameter. According to the invention, the change condition (namely the reciprocal of the response rate) of the output gray level value of one degree per liter under the current environment (including the current environment temperature, the current humidity, the working temperature of a device and other factors) is calculated by obtaining the temperature values of the two constant-temperature reference assemblies and the output gray level value of the infrared ray, so that the problem that long-time waiting is required after starting up until the system temperature is stable and the system temperature reaches thermal balance with the external environment in order to ensure that the ratio of the output gray level value of the infrared ray and the temperature of the measured target meets the ratio under the preset temperature is solved, and the temperature calibration under different environments for a long time before measurement is not required because the ratio of the output gray level value change under the specific environment temperature and the object temperature change does not need to be calculated in advance, and the rapid and accurate infrared temperature measurement under different environment temperatures is realized.
The infrared temperature measuring device of this embodiment is used to implement the foregoing infrared temperature measuring method, and therefore specific embodiments of the infrared temperature measuring device can be seen in the foregoing embodiments of the infrared temperature measuring method, for example, the gray scale obtaining module 100, the temperature obtaining module 200, the responsivity calculating module 300, the difference module 400, and the temperature determining module 500 are respectively used to implement steps S101, S102, S103, S104, and S105 in the foregoing infrared temperature measuring method, so that the specific embodiments thereof may refer to descriptions of corresponding embodiments of each portion, and are not described herein again.
The application also provides infrared temperature measurement equipment which is called as a fourth specific embodiment, the structural schematic diagram of the infrared temperature measurement equipment is shown in fig. 4, the infrared temperature measurement equipment comprises a monitoring end and a reference end, and the monitoring end and the reference end are arranged in a separated mode;
the monitoring end comprises a processor 101, an infrared sensor 102 and an optical lens 103;
the reference end comprises a first constant temperature reference component 201 and a second constant temperature reference component 202;
the reference end and the target to be detected are positioned in the field of view of the optical lens 103;
the first constant temperature reference assembly 201 comprises a first temperature sensor for measuring a temperature value of the first constant temperature reference assembly 201; the second constant temperature reference assembly 202 comprises a second temperature sensor for measuring a temperature value of the second constant temperature reference assembly 202;
the infrared sensor 102 is configured to determine an output gray scale value of the infrared ray emitted by the first constant temperature reference assembly, an output gray scale value of the infrared ray emitted by the second constant temperature reference assembly, and an output gray scale value of the infrared ray emitted by the target to be detected;
the processor 101 is configured to perform the steps of the infrared thermometry method as described in any of the above.
As a preferred embodiment, the first constant temperature reference component 201 is disposed inside the monitoring end, a schematic structural diagram of the first constant temperature reference component is shown in fig. 5, and the first constant temperature reference component 201 is disposed inside the monitoring end, so that only one second constant temperature reference component 202 separated from the monitoring end needs to be disposed during installation of the infrared temperature measurement device, which greatly reduces the space for installing the device, simplifies the installation steps, and improves the installation efficiency. In this case, the error caused by the different distances from the first constant temperature reference assembly 201 and the second constant temperature reference assembly 202 to the processor 101 can be solved by the infrared temperature measurement method provided in the second embodiment.
Furthermore, when the infrared ray of the first constant temperature reference assembly 201 can be directly received by the infrared sensor 102, and the infrared ray of the object to be measured and the infrared ray of the second constant temperature reference assembly 202 need to be received by the infrared sensor 102 through the optical lens 103 of the monitoring end (it can be understood that the above-mentioned case where the first constant temperature reference assembly 201 is disposed on the monitoring end), the monitoring end further includes:
and the lens corrector is used for correcting the first gray scale parameter through the energy attenuation coefficient of the optical lens 103, so that the first gray scale parameter is the gray scale parameter after the energy attenuation of the optical lens 103. Since the infrared rays emitted from the first constant temperature reference component 201 do not need to pass through the optical lens 103 for receiving the outside of the monitoring end when the first constant temperature reference component 201 is directly disposed in the monitoring end, and thus the energy attenuation of the optical lens 103 does not exist, in this embodiment, the infrared rays emitted from the first constant temperature reference component 201 are corrected by the lens corrector, so that the finally obtained first gray scale parameter, the second gray scale parameter and the target gray scale parameter are gray scale parameters after being attenuated by the lens.
Furthermore, the infrared temperature measurement device further includes a distance sensor 104 for measuring the distance between each constant temperature reference component at the reference end and the target to be measured and the infrared sensor 102. Still further, the infrared temperature measurement device further comprises an alarm 105, which is used for sending an alarm prompt when the measured temperature value is higher than a preset alarm threshold value.
It should be noted that neither fig. 4 nor fig. 5 show the position of the object to be measured.
As a preferred embodiment, the distance from the first constant temperature reference assembly 201 to the infrared sensor 102 is the same as the distance from the second constant temperature reference assembly 202 to the infrared sensor 102, which avoids measurement errors caused by the difference in the distance traveled by infrared rays in the atmosphere between the first gray scale parameter and the second gray scale parameter.
In addition, the fixed transmission frequency of the first constant temperature reference component 201 is the same as the fixed transmission frequency of the second constant temperature reference component. Furthermore, the fixed emissivity of the first constant temperature reference component 201 and the second constant temperature reference component is 0.98, and 0.98 is close to the fixed emission frequency of the human body, so that the accuracy of the infrared detection device is higher when the infrared detection device measures the body temperature of the human body.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The infrared temperature measuring method and device provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. An infrared temperature measurement method is characterized by comprising the following steps:
acquiring an output gray value of an infrared signal of a first constant temperature reference assembly, an output gray value of an infrared signal of a second constant temperature reference assembly and an output gray value of an infrared signal of a target to be detected as a first gray parameter, a second gray parameter and a target gray parameter respectively;
acquiring a temperature value of the first constant-temperature reference assembly and a temperature value of the second constant-temperature reference assembly, and respectively taking the temperature values as a first temperature parameter and a second temperature parameter;
obtaining the response rate of the infrared sensor by using the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter;
obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter;
and obtaining the target temperature value to be measured according to the relative temperature difference and the first temperature parameter.
2. The infrared temperature measurement method according to claim 1, wherein when the distances between the first constant temperature reference assembly, the second constant temperature reference assembly, and the target to be measured and the infrared sensor are different, the process of obtaining the relative temperature difference specifically includes:
acquiring a difference between the distance from the first constant temperature reference assembly to the infrared sensor and the distance from the second constant temperature reference assembly to the infrared sensor as a first distance difference value;
acquiring the difference between the distance from the target to be detected to the infrared sensor and the distance from the second constant-temperature reference assembly to the infrared sensor as a target distance difference value;
obtaining a first calibration gray scale parameter through machine learning by taking the first distance difference value and the first gray scale parameter as input values, and obtaining a target calibration gray scale parameter through machine learning by taking the target distance difference value and the target gray scale parameter as input values;
correspondingly, the obtaining of the response rate of the infrared sensor by using the first gray scale parameter, the second gray scale parameter, the first temperature parameter and the second temperature parameter specifically includes:
obtaining the response rate of the infrared sensor by using the first calibration gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter;
correspondingly, the obtaining of the relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter specifically comprises:
and obtaining a relative temperature difference value through the response rate, the first calibration gray scale parameter and the target gray scale parameter.
3. The infrared temperature measurement method of claim 1, further comprising, after obtaining the temperature value of the target to be measured:
and determining the corresponding internal temperature of the target to be detected according to the temperature value.
4. An infrared temperature measuring device, comprising:
the gray level acquisition module is used for acquiring an output gray level value of the infrared signal of the first constant temperature reference assembly, an output gray level value of the infrared signal of the second constant temperature reference assembly and an output gray level value of the infrared signal of the target to be detected as a first gray level parameter, a second gray level parameter and a target gray level parameter respectively;
the temperature acquisition module is used for acquiring the temperature value of the first constant-temperature reference assembly and the temperature value of the second constant-temperature reference assembly as a first temperature parameter and a second temperature parameter respectively;
the response rate calculation module is used for obtaining the response rate of the infrared sensor by utilizing the first gray parameter, the second gray parameter, the first temperature parameter and the second temperature parameter;
the difference module is used for obtaining a relative temperature difference value through the response rate, the first gray scale parameter and the target gray scale parameter;
and the temperature determining module is used for obtaining the temperature value of the target to be measured through the relative temperature difference value and the first temperature parameter.
5. The infrared temperature measurement equipment is characterized by comprising a monitoring end and a reference end, wherein the monitoring end and the reference end are arranged separately;
the monitoring end comprises a processor, an infrared sensor and an optical lens;
the reference end comprises a first constant temperature reference component and a second constant temperature reference component;
the reference end and the target to be detected are positioned in the field of view of the optical lens;
the first constant temperature reference assembly comprises a first temperature sensor for measuring a temperature value of the first constant temperature reference assembly; the second constant temperature reference assembly comprises a second temperature sensor, and the second temperature sensor is used for measuring the temperature value of the second constant temperature reference assembly;
the infrared sensor is used for determining an output gray value of the infrared rays emitted by the first constant temperature reference assembly, an output gray value of the infrared rays emitted by the second constant temperature reference assembly and an output gray value of the infrared rays emitted by the target to be detected;
the processor is used for executing the steps of the infrared thermometry method according to any one of claims 1 to 3.
6. The infrared thermometry device of claim 5, wherein the first constant temperature reference assembly is located the same distance from the infrared sensor as the second constant temperature reference assembly.
7. The infrared temperature measurement device of claim 5, wherein the first constant temperature reference assembly is disposed within the monitor end.
8. The infrared temperature measuring device of claim 5, wherein when the infrared ray of the first constant temperature reference assembly can be directly received by the infrared sensor, and the infrared ray of the object to be measured and the infrared ray of the second constant temperature reference assembly need to be received by the infrared sensor through the optical lens of the monitoring end, the monitoring end further comprises:
and the lens corrector is used for correcting the first gray parameter through the energy attenuation coefficient of the optical lens so that the first gray parameter is a gray parameter subjected to energy attenuation of the optical lens.
9. The infrared thermometric apparatus of any one of claims 5 through 8, wherein the fixed transmission frequency of the first constant temperature reference assembly is the same as the fixed transmission frequency of the second constant temperature reference assembly.
10. The infrared thermometry apparatus of claim 9, wherein the fixed emissivity of the first constant temperature reference assembly and the second constant temperature reference assembly is 0.98.
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| CN112556857B (en) * | 2020-11-26 | 2022-08-16 | 浙江大华技术股份有限公司 | Object temperature determination method and device, storage medium and electronic device |
| CN112345088A (en) * | 2021-01-11 | 2021-02-09 | 四川谛达诺科技有限公司 | Real-time double-temperature calibration infrared temperature measuring device and method |
| CN113138025A (en) * | 2021-03-18 | 2021-07-20 | 深圳市科陆精密仪器有限公司 | Automatic calibration method and device for infrared temperature measurement equipment |
| CN113532654A (en) * | 2021-06-30 | 2021-10-22 | 浙江大华技术股份有限公司 | Temperature compensation method and device, computer equipment and storage medium |
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