CN211855567U - Body temperature measuring device - Google Patents
Body temperature measuring device Download PDFInfo
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- CN211855567U CN211855567U CN202020476508.XU CN202020476508U CN211855567U CN 211855567 U CN211855567 U CN 211855567U CN 202020476508 U CN202020476508 U CN 202020476508U CN 211855567 U CN211855567 U CN 211855567U
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Abstract
The utility model relates to an infrared temperature measurement technical field, in particular to be furnished with infrared radiation thermometer of black body. A body temperature measuring device comprising: the temperature control device comprises a black body, a thermal infrared imager and a temperature control plate for regulating and controlling the temperature of the black body, wherein the black body is arranged in parallel at the front side of the thermal infrared imager, and part of the black body is positioned in the imaging range of the thermal infrared imager; the temperature control plate is arranged at the top of the thermal infrared imager; the black body, the temperature control plate and the thermal infrared imager are of an integrated structure. The utility model discloses on integrating the black body to infrared radiation thermometer, temperature feedback is from the direct feedback of black body surface temperature measurement, and equipment is whole small, low power dissipation, temperature measurement degree of accuracy improve. Need not two sets of installing supports during the deployment, can build the temperature measurement passageway fast, realize personnel's preliminary screening such as temperature information.
Description
Technical Field
The utility model relates to an infrared temperature measurement technical field, in particular to be furnished with infrared radiation thermometer of black body.
Background
The temperature belongs to the basic reference index of human health, and infected people can be rapidly screened by adopting a temperature measurement mode during epidemic situations. Temperature measurement is divided into contact detection and non-contact detection, cross infection is easily caused by contact detection, the detection speed is low, and the method is not suitable for places with large people streams such as public places. The non-contact detection mainly depends on a handheld forehead thermometer and an infrared thermometer, the handheld forehead thermometer needs a tester to be close to a tested person, and the tester can only test one person at a time, so that the defects of susceptibility to infection and low speed exist. The infrared temperature measurement is one of the most main non-contact temperature measurement modes at present, and has the advantages of high response speed, wide measurement range, high sensitivity and the like, but the temperature measurement precision of an infrared thermometer is influenced by the drift of the ambient temperature and the temperature of a detector of a thermal imager, the error is +/-2 ℃, and the standard for screening suspected patients cannot be met. In order to improve the testing precision, the infrared thermometer is configured with a black body as a reference source, the influence of the ambient temperature and the temperature drift of the thermal imager is compensated, and the measuring error can be controlled within +/-0.3 ℃.
In the existing human body temperature measurement product, a black body and a thermal imager are separately arranged, the black body is erected beside a measured person, and the farther the black body is away from a temperature measurement target due to the problem of sight distance, the larger the radiation surface is required to be. The distance between the black body and the thermal imager, the height and other factors need to be considered during installation and debugging, and the black body and the thermal imager need to be erected with higher cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: aiming at the defects of the prior art, the body temperature measuring device with small volume and high measuring precision is provided.
The technical scheme of the utility model is that: a body temperature measuring device comprising: the temperature control device comprises a black body, a thermal infrared imager and a temperature control plate for regulating and controlling the temperature of the black body; the black body is arranged in parallel at the front side of the thermal infrared imager, and part of the black body is positioned in the imaging range of the thermal infrared imager; the temperature control plate is arranged at the top of the thermal infrared imager; the black body, the temperature control plate and the thermal infrared imager are of an integrated structure.
On the basis of the scheme, the black body is specifically provided with the heating and refrigerating piece, and the temperature control plate drives the heating and refrigerating piece through the MOS tube. The heating and refrigerating plate is made of superconducting aluminum material to achieve better temperature uniformity. The surface of the heating and refrigerating piece is covered with a blackbody coating as a radiation source, the radiation rate of the blackbody coating is not lower than 0.95, and the blackbody coating has good temperature radiation performance.
On the basis of the scheme, a temperature sensor is further arranged on the surface of the black body; the absolute error of the temperature sensor is less than or equal to 0.05 ℃; the temperature sensor is in signal connection with the temperature control plate and is used for feeding back the surface temperature of the black body.
On the basis of the above scheme, further, the thermal infrared imager includes: the system comprises an infrared lens, an infrared detector, an imaging circuit module, an image processing module and a data receiving and displaying module; the infrared lens is aligned with the central axis of the infrared detector, the infrared lens is in signal connection with the infrared detector, the infrared detector is in signal connection with the imaging circuit module, the imaging circuit module is in signal connection with the image processing module, and the image processing module is in signal connection with the data receiving and displaying module.
Imaging circuit module can carry out chronogenesis and parameter configuration to infrared detector, and imaging circuit module includes: the AD acquisition sub-module, the correction sub-module and the storage sub-module; the AD acquisition sub-module is in signal connection with the infrared detector, and the correction sub-module is in signal connection with the AD acquisition sub-module, the storage sub-module and the image processing module. The AD acquisition submodule receives analog data output by the infrared detector and converts the analog data into digital data, the corrector submodule reads correction data of the storage submodule and calculates the correction data and the data of the AD acquisition submodule to obtain data after non-uniformity correction, and the corrected data are transmitted to the image processing module; the image processing module can perform face recognition, automatically calculate face temperature information after recognizing a face, and compensate the face temperature information according to the temperature reading of the black body position to obtain the face temperature within the error of +/-0.3 ℃. And the data receiving and displaying module is used for displaying and storing the image and the temperature data processed by the image processing module.
On the basis of the scheme, further, the black body and the temperature control plate are installed on the thermal infrared imager through an L-shaped installation frame; the horizontal part of the L-shaped mounting frame is fixedly connected with the top of the thermal infrared imager shell, and the temperature control plate is arranged on the horizontal part of the L-shaped mounting frame; the vertical part of the L-shaped mounting rack is provided with a black body, and the central axis of the black body is higher than the central axis of the infrared lens in the horizontal direction.
Furthermore, the size of the radiation surface of the black body is less than 25mm multiplied by 25mm, at least 20 effective pixels of the head in the imaging range of the infrared lens are covered, and the distance between the black body and the plane of the infrared lens is not more than 10 cm.
The utility model discloses a working method, including following step:
A. installing a black body and a temperature control plate on the thermal infrared imager, wherein the size of a radiation surface of the black body is less than 25mm multiplied by 25mm, at least covering 20 effective pixels at the head in the imaging range of the thermal infrared imager, and the plane distance between the black body and the thermal infrared imager is not more than 10 cm;
B. installing a thermal infrared imager to a working area, and electrifying the thermal infrared imager;
C. the temperature control plate is provided with a temperature sensor, the temperature sensor collects the real-time temperature of the surface of the black body and sends the real-time temperature to the temperature control plate, and the temperature control plate adjusts the temperature of the black body to a set temperature T through a PID algorithm0；
D. The thermal infrared imager starts to collect images, identifies the human face in the images and calculates the human face temperature beta; carrying out temperature calculation on a black body in the image to obtain the position temperature T of the black body;
E. setting temperature T using black body0Compensating the face temperature beta by the difference value alpha with the black body position temperature T to obtain the corrected temperature T1，T1＝β+KTX α, wherein KTA pre-stored coefficient related to the blackbody position temperature T;
further, step E is followed by:
F. for corrected temperature T1Make a judgment if T1When the temperature is higher than the preset temperature, the thermal infrared imager gives an alarmAnd automatically saving the image containing the temperature.
Has the advantages that: the utility model discloses on integrating the black body to infrared radiation thermometer, temperature feedback is from the direct feedback of black body surface temperature measurement, and equipment is whole small, low power dissipation, temperature measurement degree of accuracy improve. Need not two sets of installing supports during the deployment, can build the temperature measurement passageway fast, realize personnel's preliminary screening such as temperature information.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 with the thermal infrared imager removed;
FIG. 3 is a block diagram of the structure of the present invention;
FIG. 4 is a flow chart of the operation method of the present invention;
in the figure: the device comprises a 1-blackbody, a 2-thermal infrared imager, a 2.1-infrared lens, a 2.2-infrared detector, a 2.3-imaging circuit module, a 2.3.1-AD acquisition sub-module, a 2.3.2-correction sub-module, a 2.3.3-storage sub-module, a 2.4-image processing module, a 2.5-data receiving and displaying module, a 3-temperature sensor, a 4-temperature control plate and a 5-L-shaped mounting rack.
Detailed Description
Example 1, referring to fig. 1, a body temperature measuring device comprising: the temperature control device comprises a black body 1, a thermal infrared imager 2 and a temperature control plate 4 for regulating and controlling the temperature of the black body 1; the black body 1 is arranged in parallel at the front side of the thermal infrared imager 2, and part of the black body is positioned in the imaging range of the thermal infrared imager 2, so that the imaging of the thermal infrared imager 2 in other ranges is not influenced; the temperature control plate 4 is arranged at the top of the thermal infrared imager 2; the black body 1, the temperature control plate 4 and the thermal infrared imager 2 are of an integrated structure.
In this example, the black body 1 and the temperature control plate 4 are mounted on the thermal infrared imager 2 through an L-shaped mounting bracket 5; the horizontal part of the L-shaped mounting frame 5 is fixedly connected with the top of the shell of the thermal infrared imager 2, and the temperature control plate 4 is arranged on the horizontal part of the L-shaped mounting frame 5; the black body 1 is installed on the vertical portion of the L-shaped installation frame 5, and the central axis of the black body 1 is higher than the central axis of the infrared lens 2.1 in the horizontal direction.
According to the characteristics of the black body, the larger the effective radiation surface is, the larger the heat capacity is, the temperature is easier to keep in a stable state in different environments, and the heat balance is easier to ensure. Meanwhile, due to the problem of sight distance, the farther the black body is away from the temperature measurement target, the larger the radiation surface is required to be. If the radiation surface of the black body is too small, the temperature of the quasi-black body is difficult to calibrate because the black body cannot be seen clearly in a thermal imaging picture aiming at a temperature measurement target with a long distance. In the example, the size of the radiation surface of the black body 1 is less than 25mm multiplied by 25mm, the plane distance from the thermal infrared imager 2 is not more than 10cm, and 20 effective pixels at the head part in the imaging range of the infrared lens 2.1 are covered, so that the temperature measurement precision can be ensured, and the high-precision effect of the black body can be exerted.
Example 2, on the basis of example 1, the black body 1 and the temperature control plate 4 are further defined:
the black body 1 adopts heating and refrigerating sheets, and the temperature control plate 4 drives the heating and refrigerating sheets through MOS tubes. The heating and refrigerating plate is made of superconducting aluminum material to achieve better temperature uniformity. The surface of the heating and refrigerating piece is covered with a blackbody coating as a radiation source, the radiation rate of the blackbody coating is not lower than 0.95, and the blackbody coating has good temperature radiation performance.
Referring to fig. 2, a temperature sensor 3 is arranged on the surface of the black body 1; the absolute error of the temperature sensor is less than or equal to 0.05 ℃; the temperature sensor 3 is in signal connection with the temperature control plate 4 and is used for feeding back the surface temperature of the black body 1. The temperature control plate 4 adjusts the surface temperature of the black body 1 through a PID algorithm.
Example 3, on the basis of example 1 or 2, the thermal infrared imager 2 is further defined:
referring to fig. 3, the thermal infrared imager 2 includes: the system comprises an infrared lens 2.1, an infrared detector 2.2, an imaging circuit module 2.3, an image processing module 2.4 and a data receiving and displaying module 2.5; the central shafts of the infrared lens 2.1 and the infrared detector 2.2 are aligned, the infrared lens 2.1 and the infrared detector 2.2 are in signal connection, the infrared detector 2.2 and the imaging circuit module 2.3 are in signal connection, the imaging circuit module 2.3 and the image processing module 2.4 are in signal connection, and the image processing module 2.4 and the data receiving and displaying module 2.5 are in signal connection.
In this example: the 2.1 focal length of the infrared lens is more than or equal to 2 mm; the infrared detector 2.2 adopts a vanadium oxide non-refrigeration detector, and the resolution ratio is more than or equal to 160 multiplied by 120.
Imaging circuit module 2.3 can carry out chronogenesis and parameter configuration to infrared detector 2.2, include in imaging circuit module 2.3: an AD acquisition submodule 2.3.1, a syndrome module 2.3.2 and a storage submodule 2.3.3; the AD acquisition submodule 2.3.1 is in signal connection with the infrared detector 2.2, and the syndrome submodule 2.3.2 is in signal connection with the AD acquisition submodule 2.3.1, the storage submodule 2.3.3 and the image processing module 2.4. The AD acquisition submodule 2.3.1 receives analog data output by the infrared detector 2.2 and converts the analog data into digital data, the syndrome submodule 2.3.2 reads correction data of the storage submodule 2.3.3 and calculates the correction data and the data of the AD acquisition submodule 2.3.1 to obtain data after non-uniformity correction, and the corrected data are transmitted to the image processing module 2.4; the image processing module 2.4 can perform face recognition, automatically calculate face temperature information after recognizing a face, and compensate the face temperature information according to the temperature reading of the black body position to obtain the face temperature within the error of +/-0.3 ℃. And the data receiving and displaying module 2.5 displays and stores the image and the temperature data processed by the image processing module 2.4.
A. a black body 1 and a temperature control plate 4 are arranged on a thermal infrared imager 2, the size of the radiation surface of the black body 1 is less than 25mm multiplied by 25mm, at least 20 effective pixels of the head in the imaging range of the thermal infrared imager 2 are covered, and the plane distance between the black body 1 and the thermal infrared imager 2 is not more than 10 cm;
B. installing the thermal infrared imager 2 to a working area, and powering on the thermal infrared imager 2;
C. temperature regulation is realized to heating refrigeration piece in 4MOS pipe drive black body 1 of accuse temperature board, is provided with temperature sensor 3 on the black body 1, and temperature sensor 3 gathers 1 surperficial real-time temperatures of black body to send to accuse temperature board 4, accuse temperature board 4 adjusts 1 temperature of black body to setting for temperature T through PID algorithm0；
D. The thermal infrared imager 2 starts to collect images, identifies the human face in the images and calculates the human face temperature beta; carrying out temperature calculation on a black body in the image to obtain the position temperature T of the black body; in this example, after the thermal infrared imager 2 collects an image, firstly, non-uniform correction and blind pixel compensation are carried out on the original image to obtain a corrected image, and then, the temperature identification of the face and black body position is carried out on the corrected image;
E. setting temperature T using black body 10Compensating the face temperature beta by the difference value alpha with the black body position temperature T to obtain the corrected temperature T1，T1＝β+KTX α, wherein KTA pre-stored coefficient related to the blackbody position temperature T;
further, step E is followed by:
F. for corrected temperature T1Make a judgment if T1Above a predetermined temperature, the thermal infrared imager 2 will issue an alarm and automatically save the image containing the temperature.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A body temperature measuring device comprising: blackbody (1), thermal infrared imager (2) and be used for right blackbody (1) temperature carries out the accuse temperature board (4) of regulation and control, its characterized in that: the black body (1) is arranged on the front side of the thermal infrared imager (2) in parallel, and part of the black body is positioned in the imaging range of the thermal infrared imager (2); the temperature control plate (4) is arranged at the top of the thermal infrared imager (2); the black body (1), the temperature control plate (4) and the thermal infrared imager (2) are of an integrated structure.
2. A body temperature measuring device as claimed in claim 1, wherein: the blackbody (1) adopts a heating and refrigerating sheet, the surface of the heating and refrigerating sheet is covered with blackbody coating as a radiation source, and the radiation rate of the blackbody coating is not lower than 0.95.
3. A body temperature measuring device as claimed in claim 2, wherein: a temperature sensor (3) is arranged on the surface of the black body (1); the temperature sensor (3) and the temperature control plate (4) are in signal connection and used for feeding back the surface temperature of the black body (1).
4. A body temperature measuring device as claimed in claim 1 or 2, wherein: the thermal infrared imager (2) comprises: the system comprises an infrared lens (2.1), an infrared detector (2.2), an imaging circuit module (2.3), an image processing module (2.4) and a data receiving and displaying module (2.5); the infrared camera lens (2.1) and the central shaft of the infrared detector (2.2) are placed in an aligned mode, the infrared camera lens (2.1) and the infrared detector (2.2) are connected through signals, the infrared detector (2.2) and the imaging circuit module (2.3) are connected through signals, the imaging circuit module (2.3) and the image processing module (2.4) are connected through signals, and the image processing module (2.4) and the data receiving and displaying module (2.5) are connected through signals.
5. A body temperature measuring device as claimed in claim 4, wherein: the black body (1) and the temperature control plate (4) are arranged on the thermal infrared imager (2) through an L-shaped mounting rack (5); the horizontal part of the L-shaped mounting frame (5) is fixedly connected with the top of the shell of the thermal infrared imager (2), and the temperature control plate (4) is mounted on the horizontal part of the L-shaped mounting frame (5); install on the vertical portion of L type mounting bracket (5) blackbody (1), blackbody (1) the central axis is higher than in the horizontal direction infrared lens (2.1) the central axis.
6. A body temperature measuring device as claimed in claim 5, wherein: the size of the radiation surface of the black body (1) is smaller than 25mm multiplied by 25mm, at least 20 effective pixels of the head in the imaging range of the infrared lens (2.1) are covered, and the distance between the black body (1) and the plane of the infrared lens (2.1) is not more than 10 cm.
7. A body temperature measuring device as claimed in claim 2, wherein: the heating and refrigerating sheet is made of superconducting aluminum material.
8. A body temperature measuring device as claimed in claim 3, wherein: the temperature control plate (4) drives the heating and refrigerating sheet through an MOS (metal oxide semiconductor) tube, and the absolute error of the temperature sensor (3) is less than or equal to 0.05 ℃.
9. A body temperature measuring device as claimed in claim 4, wherein: the focal length of the infrared lens (2.1) is more than or equal to 2 mm; the infrared detector (2.2) adopts a vanadium oxide uncooled detector, and the resolution ratio is more than or equal to 160 multiplied by 120.
10. A body temperature measuring device as claimed in claim 4, wherein: the imaging circuit module (2.3) comprises: the AD acquisition sub-module (2.3.1), the syndrome sub-module (2.3.2) and the storage sub-module (2.3.3); AD gathers submodule (2.3.1) with infrared detector (2.2) set up signal connection, correction submodule (2.3.2) with AD gathers submodule (2.3.1), storage submodule (2.3.3) and image processing module (2.4) set up signal connection.
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|---|---|---|---|
| CN202020476508.XU CN211855567U (en) | 2020-04-03 | 2020-04-03 | Body temperature measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020476508.XU CN211855567U (en) | 2020-04-03 | 2020-04-03 | Body temperature measuring device |
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| CN211855567U true CN211855567U (en) | 2020-11-03 |
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| CN202020476508.XU Active CN211855567U (en) | 2020-04-03 | 2020-04-03 | Body temperature measuring device |
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