CN111521273B - Ear temperature measuring method and system - Google Patents
Ear temperature measuring method and system Download PDFInfo
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- CN111521273B CN111521273B CN202010356446.3A CN202010356446A CN111521273B CN 111521273 B CN111521273 B CN 111521273B CN 202010356446 A CN202010356446 A CN 202010356446A CN 111521273 B CN111521273 B CN 111521273B
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- 238000009529 body temperature measurement Methods 0.000 claims abstract description 26
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- 210000000613 ear canal Anatomy 0.000 claims description 19
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- 206010011409 Cross infection Diseases 0.000 abstract description 5
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- 210000005069 ears Anatomy 0.000 description 3
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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
- G01J5/0011—Ear thermometers
Abstract
The application discloses an ear temperature measuring method, which comprises the steps of adjusting an infrared imaging device to a measuring position so that the infrared imaging device is positioned on a path of infrared radiation emitted from a tympanic membrane of a tested human ear; acquiring a first infrared image converted according to the infrared radiation; and determining the ear temperature of the tested human ear according to the first infrared image. Therefore, the ear temperature measuring method in the application converts the infrared radiation emitted from the tympanic membrane of the tested human ear through the infrared imaging equipment to obtain the first infrared image, and then determines the ear temperature according to the first infrared image, so that the accuracy is high; the ear-measuring instrument does not need to be in direct contact with the ear of a measured person, avoids damaging the auditory meatus and the eardrum, can realize continuous measurement and has high speed; meanwhile, manual intervention is not needed in the measurement process, cross infection is avoided, and any consumable is not needed. In addition, this application still provides an ear temperature measurement system who has above-mentioned advantage.
Description
Technical Field
The application relates to the technical field of infrared temperature measurement, in particular to an ear temperature measurement method and system.
Background
Fever is usually a pathological reaction of the human body to pathogenic factors, the temperature of the human body is accurately measured, and the method has important significance for preventing and diagnosing a plurality of diseases.
The ear temperature measurement is a common temperature measurement mode, and the ear thermometer needs to send the heat sensor probe into the ear canal inside to measure, and measuring speed is slow on the one hand, and is inefficient, and on the other hand because probe and human direct contact need in time disinfect or change earmuff after the measurement finishes at every turn. The common method for disinfection is alcohol disinfection, because alcohol volatilizes and absorbs heat, the interval between two measurements needs to wait for several minutes, otherwise the measurement result is inaccurate; the mode of changing the earmuff increases the consumptive material cost on the one hand, the operating time that also increases on the one hand. In addition, the whole measurement process requires that the measurement personnel closely contact the measured person, and if the operation is improper, cross infection is easily caused, and even the ear canal and the eardrum are easily damaged.
Therefore, how to solve the above technical problems should be a great concern to those skilled in the art.
Disclosure of Invention
The application aims to provide an ear temperature measuring method and system so as to improve measuring speed and accuracy and simultaneously realize non-contact measurement.
In order to solve the above technical problem, the present application provides an ear temperature measuring method, including:
adjusting an infrared imaging device to an optimal measurement position such that the infrared imaging device is located in a path of infrared radiation emitted from a tympanic membrane of a human ear under test;
acquiring a first infrared image converted according to the infrared radiation;
and determining the ear temperature of the tested human ear according to the first infrared image.
Optionally, the adjusting the infrared imaging device to the optimal measurement position so that the infrared imaging device is located on the path of the infrared radiation emitted from the tympanic membrane of the human ear to be tested includes:
controlling the infrared imaging equipment to move in a traversing mode in a preset plane, and acquiring a second infrared image which is acquired at the position after each movement and comprises the detected human ear, wherein the distance of each movement is smaller than the projection size of the infrared radiation on the preset plane;
respectively determining the highest temperature in a plurality of second infrared images;
comparing the magnitudes of the plurality of highest temperatures in the second infrared image, and determining the highest temperature as the selected temperature;
and adjusting the infrared imaging equipment to a position corresponding to the selected temperature.
Optionally, after the controlling the infrared imaging device to traverse in the preset plane, the method further includes:
and sending an angle adjusting instruction to the holder so that the holder can adjust the angle of the infrared imaging device, wherein the angle comprises a rotation angle and/or a pitch angle.
Optionally, the adjusting the infrared imaging device to the optimal measurement position so that the infrared imaging device is located on the path of the infrared radiation emitted from the tympanic membrane of the human ear to be tested includes:
controlling the infrared imaging equipment to move in a preset plane according to a first preset path, and acquiring a third infrared image which is acquired at the current position and comprises the detected human ear, wherein the distance of each movement is smaller than the projection size of the infrared radiation on the preset plane;
determining the highest temperature in the third infrared image, and comparing the highest temperature in the third infrared image with the highest temperature in the infrared image acquired at the previous position;
if the highest temperature of the current position is higher than the highest temperature of the last position, continuing to move according to a first preset path until the highest temperature corresponding to the current position is lower than the highest temperature corresponding to the last position, and determining the last position corresponding to the highest temperature as a first measurement position;
if the highest temperature of the current position is smaller than the highest temperature of the last position, stopping moving according to a first preset path, and determining the last position corresponding to the highest temperature as the first measurement position;
determining a second preset path according to the preset path conversion direction, replacing the first path with the second path, repeating the process of determining the first measurement position, correspondingly obtaining a second measurement position, and comparing the maximum temperature corresponding to the second measurement position with the maximum temperature corresponding to the first measurement position;
if the highest temperature corresponding to the second measurement position is larger than the highest temperature corresponding to the first measurement position, continuing to determine a next path according to the preset path conversion direction, determining the highest temperature on the next path until the highest temperature on the next path is smaller than the highest temperature on the adjacent previous path, and determining the measurement position corresponding to the highest temperature on the previous path adjacent to the next path as the optimal measurement position;
and if the highest temperature corresponding to the second measurement position is smaller than the highest temperature corresponding to the first measurement position, determining a next preset path according to a direction opposite to the preset path conversion direction, determining the highest temperature on the next path until the highest temperature on the next path is smaller than the highest temperature on the adjacent previous path, and determining the measurement position corresponding to the highest temperature on the previous path adjacent to the next path as the optimal measurement position.
The adjusting the infrared imaging device to an optimal measurement position such that the infrared imaging device is located in a path of infrared radiation emitted from a tympanic membrane of the human ear to be tested comprises:
sending a rotation adjusting instruction to a reflector so that the reflector can adjust the horizontal inclination angle and reflect the infrared radiation;
controlling the infrared imaging equipment to move point by point in the vertical direction, and acquiring a fourth infrared image acquired at the position after each movement; the distance of each movement is smaller than the projection size of the infrared radiation in the vertical plane where the infrared imaging equipment is located;
determining the highest temperature in a plurality of the fourth infrared images respectively;
comparing the magnitudes of the plurality of maximum temperatures in the fourth infrared image, and determining the maximum temperature as the selected temperature;
and adjusting the infrared imaging equipment to a position corresponding to the selected temperature.
Optionally, after determining the ear temperature of the human ear to be tested according to the infrared image, the method further includes:
verifying whether the ear temperature is the real ear temperature of the tested human ear;
if the ear temperature is the real ear temperature, outputting the ear temperature;
and if the ear temperature is not the real ear temperature, correcting the ear temperature to be the real ear temperature, or sending alarm information.
Optionally, the verifying whether the ear temperature is the real ear temperature of the tested human ear includes:
acquiring the depth of the auditory canal of the tested human ear;
judging whether the depth of the auditory canal is within a preset depth range;
if the depth of the ear canal is within the preset depth range, the ear temperature is the real ear temperature;
if the ear canal depth is not within the preset depth range, the ear temperature is not the true ear temperature.
Optionally, the verifying whether the ear temperature is the real ear temperature of the tested human ear includes:
obtaining a curved surface to be judged according to the highest temperature corresponding to each moved position;
judging whether the curved surface to be judged is a two-dimensional Gaussian-like curved surface or a flattened two-dimensional Gaussian-like curved surface;
if the curved surface to be judged is a two-dimensional Gaussian-like curved surface, the ear temperature is the real ear temperature;
and if the curved surface to be judged is a flattened two-dimensional Gaussian-like curved surface, the ear temperature is not the real ear temperature.
Optionally, after the ear temperature is not the real ear temperature, further comprising:
fitting the highest temperature corresponding to each moved position to obtain the two-dimensional Gaussian-like curved surface, and determining the temperature of the highest point of the two-dimensional Gaussian-like curved surface as the true ear temperature.
Optionally, before the adjusting the measurement position of the infrared imaging device, the method further includes:
and adjusting the infrared imaging equipment to an initial position so that the ear to be detected is positioned at the central position of the image collected by the infrared imaging equipment.
The present application further provides an ear temperature measurement system, including:
the infrared imaging device is used for converting infrared radiation emitted from a tympanic membrane of a tested human ear to obtain a first infrared image;
the position adjusting device is used for adjusting the position of the infrared imaging device;
a processor for performing the steps of any of the above-described ear temperature measurement methods.
Optionally, the method further includes:
a mirror.
The ear temperature measuring method provided by the application comprises the steps of adjusting an infrared imaging device to a measuring position so that the infrared imaging device is positioned on a path of infrared radiation emitted from a tympanic membrane of a tested human ear; acquiring a first infrared image converted according to the infrared radiation; and determining the ear temperature of the tested human ear according to the first infrared image.
Therefore, the ear temperature measuring method in the application converts the infrared radiation emitted from the tympanic membrane of the tested human ear through the infrared imaging equipment to obtain the first infrared image, and then determines the ear temperature according to the first infrared image, so that the accuracy is high; the ear-measuring instrument does not need to be in direct contact with the ear of a measured person, avoids damaging the auditory meatus and the eardrum, can realize continuous measurement and has high speed; meanwhile, manual intervention is not needed in the measurement process, cross infection is avoided, and any consumable is not needed. In addition, this application still provides an ear temperature measurement system who has above-mentioned advantage.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method for measuring ear temperature according to an embodiment of the present disclosure;
FIG. 2 is a flowchart illustrating an exemplary embodiment of adjusting an infrared imaging device to an optimal measurement position;
FIG. 3 is a schematic view of an angle of infrared radiation emitted from the eardrum and a corresponding predetermined plane;
FIG. 4 is a flowchart illustrating another exemplary method for adjusting an infrared imaging device to an optimal measurement position according to an embodiment of the present disclosure;
FIG. 5 is a graph illustrating the maximum ear temperature obtained at the end of a predetermined path;
FIG. 6 is a schematic diagram of a curve formed by maximum temperatures obtained by two adjacent preset paths;
FIG. 7 is a schematic view of a replacement movement preset path;
FIG. 8 is a flow chart of another method of ear temperature measurement provided by an embodiment of the present application;
FIG. 9 is a flowchart illustrating a method for verifying whether an ear temperature is a true ear temperature of a human ear under test according to an embodiment of the present disclosure;
FIG. 10 is a flowchart illustrating another method for verifying whether an ear temperature is a true ear temperature of a human ear under test according to an embodiment of the present disclosure;
FIG. 11 is a schematic diagram of a two-dimensional Gaussian-like surface;
FIG. 12 is a schematic view of an ear temperature measurement system;
fig. 13 is a schematic structural view of the pan/tilt head;
FIG. 14 is a schematic diagram of correcting ear temperature measurements based on ear canal depth.
FIG. 15 is a flow chart illustrating another exemplary method for adjusting an infrared imaging device to an optimal measurement position according to an embodiment of the present disclosure;
FIG. 16 is a schematic top view of a nominal optimal measurement position using a planar mirror and an infrared imaging device;
FIG. 17 is a schematic top view of a nominal optimal measurement position using a convex mirror and an infrared imaging device.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Just as the background art part, utilize ear thermometer to survey ear temperature among the prior art, need send into ear canal inside with the heat sensor probe in the ear thermometer and measure, speed is slow, and misoperation easily causes ear canal and eardrum damage to because probe and human direct contact need disinfect or change the earmuff, can not continuous measurement with the disinfection of alcohol, otherwise measurement accuracy is poor, change the earmuff, increase the consumptive material cost, in addition, need manual measurement, increase survey personnel and surveyed personnel's the probability of taking place cross infection.
In view of the above, the present application provides an ear temperature measurement method, please refer to fig. 1, where fig. 1 is a flowchart of an ear temperature measurement method provided in an embodiment of the present application, and the method includes:
step S101: the infrared imaging device is adjusted to an optimal measurement position such that the infrared imaging device is in the path of infrared radiation emitted from the tympanic membrane of the human ear under test.
The ear canal can be considered as a cylindrical tube, with the bottom of the tube (the tympanic membrane of the ear) emitting infrared radiation only parallel to the tube or at a small angle to the tube. The parallelism requirement depends on the ratio of the diameter to the length of the tube, and for the human ear, the included angle is generally within 10 °. Therefore, the infrared imaging device needs to be moved to the optimal measurement position to be in the infrared radiation exit path of the tympanic membrane, so as to measure the temperature of the tympanic membrane of the ear.
The reason for placing the infrared imaging device in the path of the infrared radiation emitted by the tympanic membrane of the ear in this embodiment is that the tympanic membrane of the ear is close to the hypothalamus of the human body temperature center, the measured temperature is accurate, and is not easily interfered by the environment.
Step S102: a first infrared image converted from the infrared radiation is acquired.
Specifically, the infrared imaging device converts the infrared radiation emitted from the eardrum of the ear to obtain the first infrared image, and the specific conversion principle is well known to those skilled in the art and will not be described in detail herein.
Step S103: and determining the ear temperature of the tested human ear according to the first infrared image.
Specifically, the process of determining the temperature in the image from the infrared image is well known to those skilled in the art, and will not be described in detail herein.
The process of adjusting the infrared imaging device to the optimal measurement position is described in further detail below. Referring to fig. 2, fig. 2 is a flowchart illustrating an exemplary embodiment of adjusting an infrared imaging device to an optimal measurement position.
Step S201: and controlling the infrared imaging equipment to move in a traversing manner in a preset plane, and acquiring a second infrared image which is acquired at the position after each movement and comprises the detected human ear, wherein the distance of each movement is smaller than the projection size of the infrared radiation on the preset plane.
The predetermined plane is a surface that receives infrared radiation emitted by the tympanic membrane of the ear. In this embodiment, the moving manner of the infrared imaging device is not specifically limited, and may be determined according to circumstances, for example, the infrared imaging device continuously moves in the horizontal direction, and moves point by point in the vertical direction; or continuous motion in the vertical direction and point-by-point motion in the horizontal direction.
Referring to fig. 3, an included angle of infrared radiation emitted from eardrums of ears is α, β is an inclination angle caused by a difference between human bodies or a difference between head directions, a projection size corresponding to β is a scanning range of the infrared imaging apparatus, that is, a preset plane, and if a moving distance is greater than a projection size of the infrared radiation on the scanning range, an optimal position is easily missed in a moving process.
Step S202: and respectively determining the highest temperature in the plurality of second infrared images.
After each movement, the infrared imaging device acquires a second infrared image, and the maximum temperature in the second infrared image can be obtained according to each second infrared image, and the specific process of determining the temperature in the image according to the infrared image is well known to those skilled in the art and will not be described in detail herein.
Step S203: and comparing the magnitudes of the plurality of highest temperatures in the second infrared image, and determining the highest temperature as the selected temperature.
Step S204: and adjusting the infrared imaging equipment to a position corresponding to the selected temperature.
The selected temperature is the maximum of all the maximum temperatures obtained from the second infrared image, indicating that the position at which the second infrared image corresponding to the selected temperature is acquired is the position at which infrared radiation is optimally received, i.e. the optimal measurement position.
When the area array size of the infrared imaging device is small, the second infrared image may be moved out of the ear of the person to be detected when the second infrared image is acquired in the moving process, and further, after the controlling the infrared imaging device to traverse in the preset plane, the method further includes:
and sending an angle adjusting instruction to the holder so that the holder can adjust the angle of the infrared imaging device, wherein the angle comprises a rotation angle and/or a pitch angle.
And analyzing the obtained second infrared image, and determining the rotation angle and/or the pitch angle required by the infrared imaging equipment so as to enable the tested human ear to be positioned at the center of the image.
Referring to fig. 4, fig. 4 is a flowchart illustrating another method for adjusting an infrared imaging device to an optimal measurement position according to an embodiment of the present disclosure.
Step S301: and controlling the infrared imaging equipment to move in a preset plane according to a first preset path, and acquiring a third infrared image which is acquired at the current position and comprises the detected human ear, wherein the distance of each movement is smaller than the projection size of the infrared radiation on the preset plane.
The predetermined plane is a surface that receives infrared radiation emitted by the tympanic membrane of the ear. The first preset path is not particularly limited in this embodiment, and may be, for example, a path in which the movement is continuously performed in the horizontal direction, and the movement is performed point by point in the vertical direction, or a path in which the movement is continuously performed in the vertical direction, and the movement is performed point by point in the horizontal direction.
Step S302: and determining the highest temperature in the third infrared image, and comparing the highest temperature in the third infrared image with the highest temperature in the infrared image acquired at the previous position.
Specifically, the process of determining the temperature in the image according to the infrared image is well known to those skilled in the art, and will not be described in detail herein.
Step S303: and if the highest temperature of the current position is greater than the highest temperature of the last position, continuing to move according to a first preset path until the highest temperature corresponding to the current position is less than the highest temperature corresponding to the last position, and determining the last position corresponding to the highest temperature as a first measurement position.
Taking the first preset path as a continuous motion in the horizontal direction, taking the path when moving point by point in the vertical direction as an example, obtaining a third infrared image after each movement, and further determining the highest temperature in each third infrared image, so that a curve of the measured highest ear temperature can be obtained after each movement in the horizontal direction is finished, referring to fig. 5, when the highest temperature corresponding to the current position is less than the highest temperature corresponding to the previous position, it is indicated that a position which may become the best measurement position has appeared, i.e., the position corresponding to the peak value of the curve does not need to move continuously according to the first preset path, and therefore, the width of the interval scanned in the horizontal direction can be reduced by the position and the width of the peak value of the curve.
Step S304: and if the highest temperature of the current position is smaller than the highest temperature of the last position, stopping moving according to a first preset path, and determining the last position corresponding to the highest temperature as the first measurement position.
It will be appreciated that if the highest temperature at the current location is less than the highest temperature at the last location, indicating that a location that may become the best measurement location has occurred before moving to the current location, the movement may be stopped, with the last location corresponding to the highest temperature being the first measurement location.
Step S305: and determining a second preset path according to the preset path conversion direction, replacing the first path with the second path, repeating the process of determining the first measurement position, correspondingly obtaining a second measurement position, and comparing the maximum temperature corresponding to the second measurement position with the maximum temperature corresponding to the first measurement position.
In this embodiment, the preset path changing direction is not specifically limited, and may be set by itself. When the first preset path is a path in which the motion is continuous in the horizontal direction and the motion is performed point by point in the vertical direction, the preset path transformation direction may be a direction transformation indicating that the horizontal line number is increased or decreased, for example, when the line number of the first preset path in the horizontal direction is N lines, the line number of the second preset path in the horizontal direction may be N +1 or N-1 lines; when the first predetermined path is a path in which the movement is continuous in the vertical direction and the movement is performed in the horizontal direction point by point, the predetermined path changing direction may be a direction change indicating that the number of horizontal rows increases or decreases, for example, when the number of columns of the first predetermined path in the vertical direction is N columns, the number of columns of the second predetermined path in the vertical direction may be N +1 or N-1 columns.
It will be appreciated that a curve formed by the maximum temperatures at different locations may also be obtained during the movement of the second predetermined path, the second measurement location being the post-movement location on the curve corresponding to the peak temperature.
Step S306: if the highest temperature corresponding to the second measurement position is larger than the highest temperature corresponding to the first measurement position, the next path is continuously determined according to the preset path conversion direction, the highest temperature on the next path is determined until the highest temperature on the next path is smaller than the highest temperature on the adjacent previous path, and the measurement position corresponding to the highest temperature on the previous path adjacent to the next path is determined to be the optimal measurement position.
It can be understood that if the highest temperature corresponding to the second measurement position is greater than the highest temperature corresponding to the first measurement position, it indicates that the preset path change direction is a direction close to the optimal measurement position, so that the next path is determined continuously according to the preset path change direction, and the highest temperature on the last path is higher than that on the previous path, so that the measurement position corresponding to the highest temperature on the last path is the optimal measurement position.
Step S307: and if the highest temperature corresponding to the second measurement position is smaller than the highest temperature corresponding to the first measurement position, determining a next preset path according to a direction opposite to the preset path conversion direction, determining the highest temperature on the next path until the highest temperature on the next path is smaller than the highest temperature on the adjacent previous path, and determining the measurement position corresponding to the highest temperature on the previous path adjacent to the next path as the optimal measurement position.
It will be appreciated that if the maximum temperature corresponding to the second measurement location is less than the maximum temperature corresponding to the first measurement location, indicating that the predetermined path change direction is a direction away from the optimal measurement location, the direction should be changed. The position of the movement interval may be gradually narrowed until the optimal measurement position is finally determined. Referring to fig. 6, a curve formed by the highest temperatures obtained by two adjacent preset paths may determine the transformation direction of the path according to the curve.
Referring to fig. 7, a schematic diagram of the preset moving path is replaced, in which a horizontal arrow indicates the moving path of the infrared imaging device, a vertical arrow indicates the direction of path change, and a solid dot indicates the optimal measurement position. The arrow 1 path is an initial path, a highest temperature can be obtained on the path, then the direction is changed according to the arrow A (the path direction is downward), the arrow 2 path is obtained, a highest temperature can also be obtained on the path, the highest temperature on the arrow 2 path is smaller than the highest temperature on the arrow 1 path because the direction of changing the arrow 2 path is far away from the optimal measurement position, therefore, the direction is changed, namely, the arrow 3 path is obtained according to the arrow B direction, a highest temperature can also be obtained on the path, the arrow 3 path is closer to the optimal measurement position relative to the arrow 1 path, the arrow 4 path is continuously obtained according to the arrow B direction, the arrow 4 path is far away from the optimal measurement position relative to the arrow 3 path, and the arrow 5 path is obtained according to the direction (the arrow A direction) opposite to the arrow B direction, and so on until the best measurement position is determined.
According to the ear temperature measuring method, the infrared radiation emitted from the tympanic membrane of the tested human ear is converted through the infrared imaging equipment to obtain the first infrared image, and then the ear temperature is determined according to the first infrared image, so that the accuracy is high; the ear-measuring instrument does not need to be in direct contact with the ear of a measured person, avoids damaging the auditory meatus and the eardrum, can realize continuous measurement and has high speed; meanwhile, manual intervention is not needed in the measurement process, cross infection is avoided, and any consumable is not needed.
Referring to fig. 15, fig. 15 is a flowchart illustrating another exemplary method for adjusting an infrared imaging device to an optimal measurement position according to an embodiment of the present disclosure.
Step S701: and sending a rotation adjusting instruction to the reflector so that the reflector can adjust the horizontal inclination angle and reflect the infrared radiation.
The rotation adjusting instruction comprises a leftward rotation adjusting instruction and a rightward rotation adjusting instruction, and the angle of each rotation is not specifically limited in the application and can be set by oneself.
It should be noted that, in the present application, the counter mirror may be a planar mirror, or a convex mirror, and the convex mirror may amplify an included angle of an outgoing beam of infrared radiation, so as to reduce the number of times of angle adjustment by rotation of the mirror, and increase the ear temperature measurement speed.
Step S702: controlling the infrared imaging equipment to move point by point in the vertical direction, and acquiring a fourth infrared image acquired at the position after each movement; and the distance of each movement is smaller than the projection size of the infrared radiation in the vertical plane where the infrared imaging equipment is located.
It can be understood that, since the reflecting mirror reflects the infrared radiation emitted by the tympanic membrane, the infrared imaging device only needs to move up and down in the vertical direction to collect the reflected infrared radiation for imaging.
It should be noted that, in the present application, the sequence of steps S701 and S702 is not specifically limited, and may be interchanged, and the movement of the infrared imaging device and the rotation of the mirror are adjusted and moved in coordination with each other, so that the infrared imaging device collects the reflected infrared radiation.
Step S703: determining the highest temperature in a plurality of the fourth infrared images respectively.
After each point-by-point movement, the infrared imaging device acquires a fourth infrared image, and the maximum temperature in the fourth infrared image can be obtained according to each fourth infrared image, and the specific process of determining the temperature in the image according to the infrared image is well known to those skilled in the art and is not described in detail herein.
Step S704: comparing the magnitudes of the plurality of maximum temperatures in the fourth infrared image, and determining the maximum temperature as the selected temperature.
Each fourth infrared image corresponds to a maximum temperature, and the selected temperature in this step is the maximum of all the maximum temperatures in the plurality of fourth infrared images.
Step S705: and adjusting the infrared imaging equipment to a position corresponding to the selected temperature.
The selected temperature is the maximum of all the highest temperatures obtained from the fourth infrared image, indicating that the position at which the fourth infrared image corresponding to the selected temperature is acquired is the position at which the reflected infrared radiation is optimally received, i.e. the optimal measurement position.
On the basis of the above embodiments, in an embodiment of the present application, please refer to fig. 8, the ear temperature measuring method includes:
step S401: the infrared imaging device is adjusted to an optimal measurement position such that the infrared imaging device is in the path of infrared radiation emitted from the tympanic membrane of the human ear under test.
Step S402: a first infrared image converted from the infrared radiation is acquired.
Step S403: and determining the ear temperature of the tested human ear according to the first infrared image.
Step S404: verifying whether the ear temperature is the real ear temperature of the tested human ear.
Step S405: and if the ear temperature is the real ear temperature, outputting the ear temperature.
Step S406: and if the ear temperature is not the real ear temperature, correcting the ear temperature to be the real ear temperature, or sending alarm information.
In this embodiment, the alarm information is not specifically limited, and may be any one of or any combination of sound alarm information, text alarm information, and flash alarm information, depending on the situation.
Considering individual difference, the internal structures of different human ears may be different, and even under the condition of shielding foreign matters, such as earwax, earwax tumors and the like, the ear temperature can be further verified, so that the reliability of the measurement result is further improved.
The following further explains whether the ear temperature is the true ear temperature of the tested human ear. Referring to fig. 9, fig. 9 is a flowchart illustrating a method for verifying whether an ear temperature is a true ear temperature of a human ear to be tested according to an embodiment of the present disclosure, including:
step S501: and acquiring the ear canal depth of the tested human ear.
In particular, the ear canal depth may be measured with a depth camera or a distance detector.
Step S502: and judging whether the depth of the auditory canal is within a preset depth range.
Step S503: and if the depth of the ear canal is within the preset depth range, the ear temperature is the real ear temperature.
It should be noted that, in this embodiment, the preset depth range is not specifically limited, and may be set by itself.
Step S504: if the ear canal depth is not within the preset depth range, the ear temperature is not the true ear temperature.
Further, when the depth of the ear canal is not within the preset depth range, the ear temperature can be corrected according to the measured depth of the ear canal, so that the real ear temperature can be obtained. Referring to fig. 14, when the ear canal depth is smaller than the first depth threshold, the ear temperature is the failure ear temperature, and the ear temperature is not corrected, and when the ear canal depth is not smaller than the first depth threshold, the ear temperature is corrected.
Referring to fig. 10, fig. 10 is another flow chart for verifying whether the ear temperature is the true ear temperature of the tested human ear according to the embodiment of the present application, including:
step S601: and obtaining the curved surface to be judged according to the highest temperature corresponding to each moved position.
The maximum temperature corresponding to each moved position is the maximum temperature obtained by the infrared imaging device at each moved position in the processes of steps S201 to S204, or in the processes of steps S301 to S307. The plurality of points with the highest degree being mutually discrete are connected to obtain the curved surface to be determined, and the curved surface to be determined can be obtained by a least square fitting method.
Step S602: and judging whether the curved surface to be judged is a two-dimensional Gaussian-like curved surface or a flattened two-dimensional Gaussian-like curved surface.
Fig. 11 shows a schematic diagram of a two-dimensional gaussian curved surface, where the curved surface has a highest point, and the highest point is the ear temperature.
Step S603: and if the curved surface to be judged is a two-dimensional Gaussian-like curved surface, the ear temperature is the real ear temperature.
Step S604: and if the curved surface to be judged is a flattened two-dimensional Gaussian-like curved surface, the ear temperature is not the real ear temperature.
Further, when the ear temperature is not the true ear temperature, the method further comprises, after the ear temperature is not the true ear temperature:
fitting the highest temperature corresponding to each moved position to obtain the two-dimensional Gaussian-like curved surface, and determining the temperature of the highest point of the two-dimensional Gaussian-like curved surface as the true ear temperature.
Wherein the fitting algorithm includes, but is not limited to, least squares method, least mean square error method, etc.; further, the curved surface obtained by fitting may be an N-order polynomial surface, in addition to a two-dimensional gaussian-like curved surface.
On the basis of the foregoing embodiment, in an embodiment of the present application, before the adjusting the measurement position of the infrared imaging apparatus, the method further includes:
and adjusting the infrared imaging equipment to an initial position so that the ear to be detected is positioned at the central position of the image collected by the infrared imaging equipment.
Due to the difference in height of the ears of the tested person, the infrared imaging device needs to be adjusted to a proper height so as to determine the optimal measurement position.
The process of adjusting the infrared imaging device to the initial position is further described below. The first way to adjust the infrared imaging device to the initial position is:
acquiring a visible light image including the human ear to be detected;
calculating the height of the ear according to the visible light image;
and adjusting the infrared imaging equipment to the height.
The position of the infrared imaging equipment needs to be calibrated, a visible light image is collected by a visible light camera, the visible light image comprises the full appearance of the ear of a tested person, the height of the ear can be directly calculated according to the machine vision, and then the height from the infrared imaging equipment to the ear is adjusted.
The second way to adjust the infrared imaging device to the initial position is:
acquiring a current infrared image acquired by the infrared imaging equipment;
identifying a body part of the subject's ear located at the center position of the current infrared image;
in particular, the body part of the central position is determined according to an image recognition algorithm.
And adjusting the infrared imaging equipment to enable the ear to be positioned at the central position according to the position relation between the body part and the ear.
Specifically, when the body part at the center position is an arm or a shoulder, the infrared imaging apparatus starts to be raised until an ear is recognized at the center position; if the person is not identified or the top of the person's head is seen, the infrared camera starts to descend until the ear is identified in the center position.
The third method for adjusting the infrared imaging device to the initial position is that the infrared imaging device is moved upwards by default, and the ear is identified in the center of the image collected by the infrared imaging device and then the infrared imaging device stops; if the ear is not found at the end of the stroke, the infrared imaging device moves downwards until the ear is identified in the center of the image.
The present application further provides an ear temperature measuring system, please refer to fig. 12, which includes:
an infrared imaging device 1 for converting infrared radiation emitted from a tympanic membrane of a subject's ear to obtain a first infrared image;
a position adjusting device 2 for adjusting the position of the infrared imaging device 1;
a processor 3 for performing the steps of any of the above-described ear temperature measurement methods.
Wherein, the infrared imaging device 1 includes but is not limited to a thermal infrared imager; the position adjusting apparatus 2 is a multi-axis robot or a serial robot.
Optionally, the ear temperature measuring system further comprises: and the holder is connected with the position adjusting device and is used for adjusting the angle of the infrared imaging device, wherein the angle comprises a rotating angle and/or a pitching angle. Please refer to fig. 13 for a schematic structural diagram of the pan/tilt head.
Optionally, the ear temperature measuring system further comprises: the visible light camera is used for collecting a visible light image comprising the whole appearance of the human ear to be detected.
Optionally, the ear temperature measuring system further comprises: a depth camera or a distance detector for the ear canal depth of the human ear to be measured.
Optionally, the ear temperature measuring system further comprises: a mirror 4.
Referring to fig. 16 and 17, fig. 16 is a schematic structural diagram of a nominal optimal measurement position using a planar mirror and an infrared imaging device, and fig. 17 is a schematic structural diagram of a nominal optimal measurement position using a convex mirror and an infrared imaging device.
It should be noted that, in the present application, the counter mirror may be a planar mirror, or a convex mirror, and the convex mirror may amplify an included angle of an outgoing beam of infrared radiation, so as to reduce the number of times of angle adjustment by rotation of the mirror, and increase the ear temperature measurement speed.
The ear temperature measurement method in the present application is further explained below.
Step 1: and adjusting the infrared imaging equipment to an initial position so that the ear of the tested person is positioned at the central position of the image collected by the infrared imaging equipment.
Step 2: the infrared imaging device is adjusted to an optimal measurement position such that the infrared imaging device is positioned in a path of infrared radiation emitted from a tympanic membrane of the human ear under test.
And step 3: a first infrared image converted from infrared radiation is acquired.
And 4, step 4: and determining the ear temperature of the tested human ear according to the first infrared image.
And 5: and verifying whether the ear temperature is the real ear temperature of the tested human ear.
Step 6: if the ear temperature is the real ear temperature, the ear temperature is output.
And 7: and if the ear temperature is not the real ear temperature, correcting the ear temperature to be the real ear temperature, or sending alarm information.
And 8: and when the ear temperature is not the real ear temperature, fitting the highest temperature corresponding to each moved position to obtain a two-dimensional Gaussian-like curved surface, and determining the temperature of the highest point of the two-dimensional Gaussian-like curved surface as the real ear temperature.
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.
The ear temperature measuring method and system provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (8)
1. An ear temperature measurement method, comprising:
adjusting an infrared imaging device to an optimal measurement position such that the infrared imaging device is located in a path of infrared radiation emitted from a tympanic membrane of a human ear under test;
acquiring a first infrared image converted according to the infrared radiation;
determining the ear temperature of the tested human ear according to the first infrared image;
the adjusting the infrared imaging device to an optimal measurement position such that the infrared imaging device is located in a path of infrared radiation emitted from a tympanic membrane of the human ear to be tested comprises:
controlling the infrared imaging equipment to move in a preset plane according to a first preset path, and acquiring a third infrared image which is acquired at the current position and comprises the detected human ear, wherein the distance of each movement is smaller than the projection size of the infrared radiation on the preset plane;
determining the highest temperature in the third infrared image, and comparing the highest temperature in the third infrared image with the highest temperature in the infrared image acquired at the previous position;
if the highest temperature of the current position is higher than the highest temperature of the last position, continuing to move according to a first preset path until the highest temperature corresponding to the current position is lower than the highest temperature corresponding to the last position, and determining the last position corresponding to the highest temperature as a first measurement position;
if the highest temperature of the current position is smaller than the highest temperature of the last position, stopping moving according to a first preset path, and determining the last position corresponding to the highest temperature as the first measurement position;
determining a second preset path according to the preset path changing direction, replacing the first preset path with the second preset path, repeating the process of determining the first measuring position, correspondingly obtaining a second measuring position, and comparing the maximum temperature corresponding to the second measuring position with the maximum temperature corresponding to the first measuring position;
if the highest temperature corresponding to the second measurement position is larger than the highest temperature corresponding to the first measurement position, continuing to determine a next path according to the preset path conversion direction, determining the highest temperature on the next path until the highest temperature on the next path is smaller than the highest temperature on the adjacent previous path, and determining the measurement position corresponding to the highest temperature on the previous path adjacent to the next path as the optimal measurement position;
and if the highest temperature corresponding to the second measurement position is smaller than the highest temperature corresponding to the first measurement position, determining a next preset path according to a direction opposite to the preset path conversion direction, determining the highest temperature on the next path until the highest temperature on the next path is smaller than the highest temperature on the adjacent previous path, and determining the measurement position corresponding to the highest temperature on the previous path adjacent to the next path as the optimal measurement position.
2. The ear temperature measurement method according to claim 1, further comprising, after said determining the ear temperature of the human ear under test from the first infrared image:
verifying whether the ear temperature is the real ear temperature of the tested human ear;
if the ear temperature is the real ear temperature, outputting the ear temperature;
and if the ear temperature is not the real ear temperature, correcting the ear temperature to be the real ear temperature, or sending alarm information.
3. The ear temperature measurement method according to claim 2, wherein said verifying whether the ear temperature is the true ear temperature of the human ear under test comprises:
acquiring the depth of the auditory canal of the tested human ear;
judging whether the depth of the auditory canal is within a preset depth range;
if the depth of the ear canal is within the preset depth range, the ear temperature is the real ear temperature;
if the ear canal depth is not within the preset depth range, the ear temperature is not the true ear temperature.
4. The ear temperature measurement method according to claim 2, wherein said verifying whether the ear temperature is the true ear temperature of the human ear under test comprises:
obtaining a curved surface to be judged according to the highest temperature corresponding to each moved position;
judging whether the curved surface to be judged is a two-dimensional Gaussian-like curved surface or a flattened two-dimensional Gaussian-like curved surface;
if the curved surface to be judged is a two-dimensional Gaussian-like curved surface, the ear temperature is the real ear temperature;
and if the curved surface to be judged is a flattened two-dimensional Gaussian-like curved surface, the ear temperature is not the real ear temperature.
5. The ear temperature measurement method according to claim 4, further comprising, after the ear temperature is not the true ear temperature:
fitting the highest temperature corresponding to each moved position to obtain the two-dimensional Gaussian-like curved surface, and determining the temperature of the highest point of the two-dimensional Gaussian-like curved surface as the true ear temperature.
6. The ear temperature measurement method according to claim 1, further comprising, before the adjusting the measurement position of the infrared imaging device:
and adjusting the infrared imaging equipment to an initial position so that the ear to be detected is positioned at the central position of the image collected by the infrared imaging equipment.
7. An ear temperature measurement system, comprising:
the infrared imaging device is used for converting infrared radiation emitted from a tympanic membrane of a tested human ear to obtain a first infrared image;
the position adjusting device is used for adjusting the position of the infrared imaging device;
a processor for performing the steps of the ear temperature measurement method according to any one of claims 1 to 6.
8. The ear temperature measurement system according to claim 7, further comprising:
a mirror.
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