JP2021194199A - Body temperature measuring system - Google Patents

Abstract

To provide a body temperature measuring system capable of improving the measurement accuracy of a subject's body temperature measured by using a thermographic image even when a plurality of people may appear in the thermographic image.SOLUTION: A body temperature measuring system includes authentication devices 20a, 20b for performing authentication processing of a target person using the face image of the target person captured by authentication cameras 10a, 10b, thermo cameras 30a, 30b to capture the face of the target person that is authenticated by the authentication devices 20a, 20b, temperature measuring devices 40a, 40b for acquiring body temperature information on the temperature of the face of the subject from the thermo images taken by the thermo cameras 30a, 30b, and a management device 50 having a storage unit 52 in which target person identification information that can identify the target person authenticated by the authentication devices 20a, 20b and the body temperature information acquired by the temperature measuring devices 40a, 40b are stored in association with each other.SELECTED DRAWING: Figure 2

Description

The present invention relates to a body temperature measurement system that measures a subject's body temperature and creates a database.

Conventionally, at a quarantine station or the like at the time of entry, a thermography camera is used to image a subject, and the body temperature identified from the color of the subject's face or the like is confirmed in the thermography image. Specifically, a quarantine person in charge of a quarantine station or the like remembers a reference color (for example, red) corresponding to a set temperature (for example, 37.5 ° C.), and the above standard within the range occupied by the subject in the thermographic image. Check if the expression color whose temperature is higher than the color is displayed. This makes it possible to identify a subject who may have a high body temperature due to a predetermined infectious disease, such as a carrier of coronavirus.

Japanese Patent No. 4604606

By the way, not only the quarantine station but also a company, a business establishment, a factory, a building, a conference room, etc. may be assumed as a place where the subject's body temperature needs to be measured. In particular, in situations where infectious diseases are prevalent, by measuring the body temperature of the subject and creating a database in places where authentication is required at the time of admission, only infected persons can be infected when an outbreak occurs. It is possible to easily identify a person who may be infected because he / she is in contact with the infected person.

However, when multiple people including the subject whose body temperature should be measured are reflected at once in the temperature measurement area (imaging area) by the thermography camera, the subject is identified from the color image appearing in the thermography image, so that the subject is the subject. You may misunderstand who you are. Then, there is a problem that the reliability of the database in which the body temperature information of the subject is stored is lowered. For example, in the human body detection device disclosed in Patent Document 1, the imaging range of the image sensor and the heat detection range of the thermopile array are arranged so as to overlap each other, and only the human body-like range indicated by the output of the thermopile array is the face. By limiting the extraction range, the load of the face detection process can be reduced, but if a plurality of people are reflected at once, there is a possibility that the target person may be misunderstood.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to measure using the thermographic image even when a plurality of people may appear in the thermographic image. It is an object of the present invention to provide a body temperature measurement system capable of improving the measurement accuracy of a subject's body temperature.

In order to achieve the above object, the body temperature measuring system (1) according to claim 1 of the claims is
Authentication cameras (10a, 10b) that capture the face of the subject, and
An authentication unit (20a, 20b) that performs authentication processing of the subject using the face image of the subject captured by the authentication camera, and
A thermography camera (30a, 30b) that captures the face of the subject to which the authentication process is performed by the authentication unit.
Acquisition units (40a, 40b) that acquire body temperature information regarding the temperature of the subject's face from the thermography image taken by the thermography camera, and
A storage unit (50) that stores the target person identification information that can identify the target person authenticated by the authentication unit and the body temperature information acquired by the acquisition unit in association with each other.
It is characterized by having.

The body temperature measuring system (1a) according to claim 7 is
A plurality of authentication units (70a to 70c) that perform authentication processing of a target person passing through a plurality of gates (3a to 3c) for each gate, and a plurality of authentication units (70a to 70c).
A thermography camera (80) capable of simultaneously capturing an image of the target person whose authentication process is performed by the plurality of authentication units.
The subject identified from the subject identification information based on the subject identification information and the authentication time capable of identifying the target person, which are each authenticated by the plurality of authentication units, and the imaging time when the thermography image is captured by the thermography camera. An acquisition unit (50) that acquires body temperature information regarding the temperature of the subject's face from the thermography image, and
A storage unit (50) in which the subject identification information and the body temperature information are associated and stored, and
It is characterized by having.
The reference numerals in the parentheses indicate the correspondence with the specific means described in the embodiments described later.

In the invention of claim 1, the authentication unit that performs the authentication process of the target person using the face image of the target person captured by the authentication camera and the face of the target person that is authenticated by the authentication unit are imaged. The thermography camera, the acquisition unit that acquires the body temperature information related to the temperature of the subject's face from the thermography image obtained by the thermography camera, and the target person identification information that can identify the target person authenticated by the authentication unit and the body temperature acquired by the acquisition unit. A storage unit in which information is associated and stored is provided.

As a result, the body temperature information acquired from the thermography image during the authentication process is stored in the storage unit together with the subject identification information of the authenticated target person, so that even if a plurality of people appear in the thermography image, the authenticated target person is used. It becomes difficult for the body temperature information other than the person to be stored in the storage unit. The authenticated subject will also point his face to the thermography camera during the authentication process, and the face will be closer to the thermography camera than the face of another person, so that face will be of another person in the thermography image. This is because it becomes easier to occupy a wider area than the face, and as a result, the body temperature information can be easily acquired from the face of the authenticated subject in the thermographic image at the time of the authentication process. Therefore, it is possible to improve the measurement accuracy of the body temperature of the subject measured by using the thermographic image and improve the reliability of the database in which the body temperature information of the subject is stored.

In the invention of claim 2, in addition to the subject specific information and the body temperature information, the storage unit stores information about the place and time when the authentication process is performed in association with the storage unit. As a result, the behavior history of the subject can be easily grasped from the database of the storage unit in which the body temperature information of the subject is stored. Therefore, when an outbreak occurs, not only the infected person but also the infected person is contacted. Therefore, even those who may be infected can be easily identified.

In the invention of claim 3, the authentication unit controls the completion of the authentication process in accordance with the completion of the imaging of the thermography camera capable of acquiring the body temperature information and the acquisition of the temperature information. As a result, the subject who has completed the authentication does not move before the body temperature information is acquired, so that the body temperature information can be reliably acquired from the thermographic image.

In the invention of claim 4, the acquisition unit limits the range of acquiring body temperature information from the thermographic image based on the face image used at the time of the authentication process. By associating the positional relationship between the imaging range of the authentication camera and the imaging range of the thermography camera, it is possible to specify the range of the thermographic image corresponding to the face image used during the authentication process as the range of the subject's face. can. As a result, the range in which the body temperature information should be acquired can be accurately and easily specified from the thermographic image, so that the body temperature measurement can be stabilized and the processing load required for acquiring the body temperature information can be reduced.

In the invention of claim 5, the display unit capable of displaying the image pickup range by the thermography camera on the screen is arranged at a position where the face is visually recognized by the subject who is imaged by the thermography camera. As a result, the certified subject can easily turn his / her face to the thermography camera so as to easily acquire the body temperature information, so that the body temperature information can be reliably acquired from the thermography image.

In the invention of claim 6, the display screen of the display unit displays a temperature measurement range corresponding to a range in which body temperature information is acquired in a thermographic image. As a result, the certified subject can easily limit the range in which the body temperature information is acquired in the thermography image by pointing the face toward the thermography camera so that the temperature measurement part such as the forehead matches the temperature measurement range. Not only can the body temperature information be reliably acquired from the thermographic image, but also the processing load required for acquiring the body temperature information can be reduced.

In the invention of claim 7, a thermography camera capable of simultaneously imaging a plurality of authentication units that perform authentication processing for a target person passing through a plurality of gates for each gate and a target person for which authentication processing is performed by the plurality of authentication units at the same time. And, the target person specified from the target person identification information based on the target person identification information and the authentication time that can identify the target person certified by each of the plurality of authentication units and the imaging time when the thermographic image is captured by the thermography camera. An acquisition unit that acquires body temperature information regarding the temperature of the face from the thermographic image, and a storage unit that stores the subject specific information and the body temperature information in association with each other are provided.

With respect to one authentication unit specific information, the body temperature information acquired from the thermographic image at the imaging time that almost matches the authentication time is the target authenticated by the authentication unit specified from the one authentication unit specific information at the above authentication time. It can be the measurement result of the person. For this reason, even when a plurality of people appear in the thermography image, it is difficult to store the body temperature information other than the authenticated subject in the storage unit, so that the measurement accuracy of the body temperature of the subject measured using the thermography image is difficult. It is possible to improve the reliability of the database in which the body temperature information of the subject is stored. In particular, since it is not necessary to provide a thermography camera for each gate, it is possible to reduce the system introduction cost and the like as compared with the case where a thermography camera is provided for each gate.

In the invention of claim 8, the acquisition unit acquires body temperature information regarding the temperature of the face of the subject specified from the subject identification information from the thermography image divided for each of a plurality of gates. As a result, for example, the subject identification information of the subject authenticated by the first gate and the body temperature information acquired from the thermo image of the subject's face authenticated by the second gate may be erroneously associated with each other. Therefore, the reliability of the database in which the subject's body temperature information is stored can be further improved.

In the invention of claim 9, since the heating element that generates heat at a predetermined temperature is arranged within the imaging range of the thermography camera, a range that serves as a temperature measurement reference in the thermographic image can be set, so that the body temperature measurement accuracy can be improved. can.

In the invention of claim 10, since the identification display indicating the position of the heating element is arranged near the heating element, it becomes easy to detect the range occupied by the heating element from the range occupied by the identification display in the thermography image. It is possible to make it difficult to misidentify the heat source or the like as the heating element.

In the invention of claim 11, since the identification display indicating the position of the heating element is added to the heating element, it becomes easy to detect the range occupied by the heating element from the range occupied by the identification display in the thermography image. Not only can it be difficult to misidentify the heat source or the like as the heating element, but also the degree of freedom regarding the arrangement of the heating element can be increased.

In the invention of claim 12, since the identification display is an information code in which information on the position of the heating element is optically readable and recorded, even if the position of the heating element changes, the information on the changed position can be obtained. Since the above information code may be generated so as to be recorded, the degree of freedom regarding the arrangement of the heating element can be increased.

In the invention of claim 13, since the identification display lights up or blinks in a predetermined light emitting state, it is possible to easily detect the range occupied by the identification display in the thermographic image.

In the invention of claim 14, a temperature sensor capable of notifying the measurement result of the temperature of a specific position within the imaging range of the thermography camera together with the information about the specific position is provided. As a result, by receiving the measurement result of the temperature at the specific position from the temperature sensor together with the information about the specific position, the specific position can be set as the temperature measurement reference in the thermographic image, so that the body temperature measurement accuracy can be improved.

It is explanatory drawing which substantially explains the body temperature measurement system which concerns on 1st Embodiment. It is explanatory drawing explaining the authentication camera, the authentication device, the thermo camera and the temperature measuring device provided in the entrance gate. It is explanatory drawing explaining the authentication camera, the authentication device, the thermo camera and the temperature measuring device provided in the doorway. It is explanatory drawing which illustrates a part of the part where the face feature point is extracted from the photographed face image data. FIG. 3 is a block diagram schematically illustrating an electrical configuration of the management device of FIG. 1. It is a flowchart which shows the flow at the time of measuring and storing the body temperature of the subject who needs authentication in the body temperature measurement system which concerns on 1st Embodiment. It is explanatory drawing which shows the main part of the body temperature measurement system which concerns on the 2nd modification of 1st Embodiment. It is explanatory drawing which enlarges and shows the display state of the display part of FIG. It is explanatory drawing which substantially explains the body temperature measurement system which concerns on 2nd Embodiment. It is explanatory drawing which shows the main part of the body temperature measurement system which concerns on 3rd Embodiment.

[First Embodiment]
Hereinafter, the first embodiment of the body temperature measurement system according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the body temperature measurement system 1 according to the present embodiment is configured as a system that automatically measures the body temperature of the subject M who enters or enters a room that requires authentication and creates a database. .. Specifically, since the body temperature measuring system 1 measures and stores the temperature of the forehead portion of the face of the subject M as the body temperature, the authentication provided at each of the plurality of entrance gates 2a and the entrance / exit 2b that require authentication at the time of entry / exit. It is configured to include a camera, an authentication device, an infrared thermography camera for body temperature measurement (hereinafter, also simply referred to as a thermo camera), a temperature measuring device, and a management device 50 for managing the measured body temperature data of the subject. There is.

First, the authentication camera 10a, the authentication device 20a, the thermo camera 30a, and the temperature measuring device 40a provided in each entrance gate 2a will be described with reference to FIG. The entrance gate 2a is configured so that passage is permitted when the authentication device 20a determines that the authentication is successful.

The authentication camera 10a is arranged so as to capture an image of the face of the subject M to be authenticated at the entrance gate 2a, and is configured to output the captured image to the authentication device 20a.

The authentication device 20a functions as an authentication unit that performs authentication processing of the target person M by using the face image of the target person M captured by the authentication camera 10a. Specifically, the authentication device 20a acquires a range in which the face is imaged as a face image based on each face feature point extracted from the captured image of the subject M, and substantially matches each extracted face feature point. Since the facial feature point data to be performed is registered in advance, it is judged that the authentication is successful. Target person identification information (for example, personal ID such as employee number) for identifying target person M is associated with each registered facial feature point data, and each facial feature point extracted when authentication is successful. One target person-specific information associated with the facial feature point data that substantially matches the above is acquired.

In the present embodiment, as facial feature points, items such as the size and shape of each facial organ such as eyes, eyebrows, nose, ears, and mouth, contours, and placement positions of facial organs are adopted. Therefore, in response to the known facial feature point extraction process performed by the authentication device 20a, the facial image data D acquired as illustrated in FIG. 4 has characteristics for each item, for example, "D1: Eye cut length". Data such as "D2: Large mouth" is calculated and extracted as facial feature points.

As described above, since the authentication device 20a can grasp the range in which the face of the subject M is captured in the captured image, the temperature measuring position information regarding the forehead portion of the subject M whose temperature should be measured is transmitted to the temperature measuring device 40a. You can instruct against it.

When the authentication is successful, the authentication device 20a configured in this way measures the target person identification information that identifies the target person M in response to the information regarding the place and time when the authentication process is performed and the instruction of the temperature measurement position information. It is transmitted to the management device 50 in association with the body temperature information acquired from the device 40a as described later. Further, when the authentication is successful, the authentication device 20a transmits permission information for permitting passage to the entrance gate 2a.

The thermography camera 30a is arranged so that the image pickup range substantially matches the image pickup range of the authentication camera 10a, and the thermography showing the heat distribution in the image pickup range as a diagram when the authentication process is performed by the authentication device 20a. It is configured to generate an image (hereinafter, also simply referred to as a thermo image) and output it to the temperature measuring device 40a. That is, the thermo camera 30a functions to output the thermo image in which the face of the subject M being authenticated is captured to the temperature measuring device 40a.

The temperature measuring device 40a measures and acquires a temperature in a range specified from the temperature measuring position information instructed by the authentication device 20a in the thermo image received from the thermo camera 30a, and uses the measurement result as body temperature information to be used as the body temperature information in the authentication device 20a. It is configured to output to. The temperature measuring device 40a can correspond to an example of an "acquisition unit" that acquires body temperature information regarding the temperature of the subject's face from the thermo image.

Next, the authentication camera 10b, the authentication device 20b, the thermo camera 30b, and the temperature measuring device 40b provided at each entrance / exit 2b will be described with reference to FIG. The entrance / exit 2b is restricted from passing by the door of the room where entry is restricted, and the electric lock installed on the door is unlocked when the authentication device 20b is successfully authenticated so that the passage is permitted. It is configured.

The authentication camera 10b is arranged so as to capture an image of the face of the subject M to be authenticated when passing through the doorway 2b, and is configured to output the captured image to the authentication device 20b.

Similar to the authentication device 20a, the authentication device 20b is used as an authentication unit that performs authentication processing of the target person M by using each face feature point extracted from the face image of the target person M captured by the authentication camera 10b. It works. Similar to the authentication device 20a, the authentication device 20b can grasp the range in which the face of the subject M is captured in the captured image, so that the temperature measurement device can obtain the temperature measurement position information regarding the forehead portion of the subject M whose temperature should be measured. It is possible to instruct 40b. When the authentication is successful, the authentication device 20b describes the target person identification information for identifying the target person M from the temperature measuring device 40b in response to the information regarding the place and time when the authentication process is performed and the instruction of the temperature measuring position information. It is transmitted to the management device 50 in association with the body temperature information acquired in. Further, the authentication device 20b transmits an unlocking instruction to the electric lock installed on the door when the authentication is successful.

The thermo camera 30b is arranged so that its imaging range substantially matches the imaging range of the authentication camera 10b, and when the authentication process is performed by the authentication device 20b, a thermo image is generated and output to the temperature measuring device 40b. It is configured to do.

The temperature measuring device 40b measures and acquires a temperature in a range specified from the temperature measuring position information instructed by the authentication device 20b among the thermo images received from the thermo camera 30b, and uses the measurement result as body temperature information to be used as the body temperature information in the authentication device 20b. It is configured to output to. The temperature measuring device 40b can correspond to an example of an "acquisition unit" that acquires body temperature information regarding the temperature of the subject's face from the thermo image.

The management device 50 is configured as a server for managing target person identification information, body temperature information, and the like received from each authentication device 20a and each authentication device 20b. As shown in FIG. 5, the management device 50 includes a control unit 51, a storage unit 52, a display unit 53, an operation unit 54, a communication unit 55, and the like that collectively control the entire management device 50.

The storage unit 52 is composed of storage devices such as a ROM, RAM, and non-volatile memory, and the storage unit 52 contains received target person identification information, body temperature information, information on the place and time when authentication processing is performed, and the like. A stored database has been built. The display unit 53 is configured by a liquid crystal monitor or the like, and the display content is controlled by the control unit 51. The operation unit 54 is composed of a keyboard, a mouse, or the like, and is configured to give an operation signal corresponding to the operation to the control unit 51. The control unit 51 receives the operation signal and changes the content of the operation signal. Perform the corresponding operation. The communication unit 55 is a communication interface for communicating with external devices such as each authentication device 20a and each authentication device 20b, and is configured to perform communication processing in cooperation with the control unit 51.

In the management device 50 configured in this way, each time the target person identification information, body temperature information, etc. are received from each authentication device 20a or each authentication device 20b, the target person identification information, body temperature information, etc. are stored so as to be added. The database of part 52 is updated.

As a result, by analyzing the data stored in the database of the updated storage unit 52, for example, the subject who has a predetermined body temperature or higher is extracted from the certified subjects, and the extraction result or the like is obtained. Can be displayed on the screen on the display unit 53. In particular, since the database of the storage unit 52 also stores information regarding the place and time when the authentication process is performed, the behavior history of each target person can be easily grasped. Therefore, based on the behavior history of the subject extracted as described above, other subjects whose behavior histories partially overlap, such as other subjects who have been in the same room for a long time, are extracted. Then, the extraction result and the like can be displayed on the screen on the display unit 53. As a result, when an outbreak occurs, it is possible to easily identify not only the infected person but also the person who may be infected because he / she is in contact with the infected person. The management device 50 may correspond to an example of a "storage unit" in which the subject specific information and the body temperature information are stored in association with each other.

Next, in the body temperature measurement system 1 according to the present embodiment, authentication at the entrance gate 2a is an example of the processing performed by each device when storing the body temperature data and the like of each certified subject in the database. Will be described in detail with reference to the flowchart of FIG.

The authentication device 20a acquires a captured image from the authentication camera 10a (S101 in FIG. 6), and performs a face image detection process for detecting a face image from the captured image (S103). When the face image is not detected because the face feature points are not extracted from the captured image in this face image detection process (No in S105), the captured image is acquired from the authentication camera 10a and the face image is detected. Processing is repeated.

Then, when the subject M tries to pass through the entrance gate 2a and the face feature points are extracted from the captured image and the face image is detected (Yes in S105), the temperature is measured with respect to the temperature measuring device 40a. Temperature measurement position information regarding the forehead portion of the subject M to be to be is instructed (S107).

In the temperature measuring device 40a, when the temperature measuring position information is instructed from the authentication device 20a, the temperature in the range specified from the temperature measuring position information in the thermo image received from the thermo camera 30a is measured, and the measurement result is the body temperature information. Is output to the authentication device 20a. Therefore, even when a plurality of people appear in the thermo image at the same time, it is difficult to output the body temperature information other than the authenticated target person to the authentication device 20a.

When the body temperature information is acquired from the temperature measuring device 40a in response to the instruction of the temperature measuring position information (S109), the authentication device 20a uses each face feature point extracted from the image captured by the authentication camera 10a as described above. The authentication process is performed (S111). If the target person identification information is obtained as described above by the success of this authentication, the target person identification information is information on the place (for example, the information specifying the authentication device 20a) and the time when the authentication process is performed. And, it is associated with the body temperature information acquired from the temperature measuring device 40a and transmitted to the management device 50 (S113). After that, the process of acquiring the captured image from the authentication camera 10a and detecting the face image is performed again.

When the target person identification information or the like is received from the authentication device 20a, the management device 50 updates the database of the storage unit 52 so as to add the received target person identification information and body temperature information.

The authentication devices 20a and 20b may transmit the body temperature information to which the target person identification information is not associated to the management device 50 in association with the information regarding the place and time when the authentication process is performed even when the authentication fails. .. As a result, the management device 50 can also manage the body temperature information of a person different from the target person in which the target person specific information is registered in advance. Further, the authentication devices 20a and 20b may transmit the face image at the time of authentication failure to the management device 50 in association with the body temperature information or the like.

As described above, in the body temperature measurement system 1 according to the present embodiment, the authentication devices 20a and 20b that perform the authentication process of the subject using the facial images of the subject captured by the authentication cameras 10a and 10b. , Thermo cameras 30a and 30b that capture the face of the subject to be authenticated by the authentication devices 20a and 20b, and a temperature measuring device 40a that acquires body temperature information regarding the temperature of the subject's face from the thermo images by the thermo cameras 30a and 30b. , 40b, and a management device having a storage unit 52 that stores the target person identification information that can identify the target person authenticated by the authentication devices 20a and 20b and the body temperature information acquired by the temperature measuring devices 40a and 40b in association with each other. 50 and are provided.

As a result, the body temperature information acquired from the thermo image during the authentication process is stored in the database of the management device 50 together with the target person identification information of the authenticated target person, so that even if a plurality of people appear in the thermo image, the authentication is performed. It becomes difficult for the body temperature information other than the subject to be stored in the database of the management device 50. The authenticated target person turns his / her face toward the thermocameras 30a and 30b during the authentication process, and the face is closer to the thermocameras 30a and 30b than the face of another person. This is because the face tends to occupy a wider range than the face of another person, and as a result, the body temperature information can be easily acquired from the face of the authenticated subject in the thermo image at the time of the authentication process. Therefore, it is possible to improve the measurement accuracy of the body temperature of the subject measured by using the thermo image and improve the reliability of the database in which the body temperature information of the subject is stored.

In particular, in the database of the management device 50, in addition to the target person identification information and the body temperature information, information on the place and time when the authentication process is performed is associated and stored. As a result, the behavior history of the subject can be easily grasped from the database of the management device 50 in which the body temperature information of the subject is stored. Therefore, when an outbreak occurs, not only the infected person but also the infected person is contacted. Therefore, it is possible to easily identify a person who may be infected.

Further, the temperature measuring devices 40a and 40b limit the range of acquiring the body temperature information from the thermo image based on the temperature measuring position information instructed from the authentication devices 20a and 20b, that is, the face image used at the time of the authentication process. Since the positional relationship between the image pickup range of the authentication cameras 10a and 10b and the image pickup range of the thermo cameras 30a and 30b is almost the same, the range of the thermo image corresponding to the face image used in the authentication process can be set. , Can be specified as the range of the subject's face. As a result, the range in which the body temperature information should be acquired can be accurately and easily specified from the thermo image, so that the body temperature measurement can be stabilized and the processing load required for acquiring the body temperature information can be reduced. If the imaging range of the authentication camera and the imaging range of the thermo camera do not match, the body temperature information is obtained from the thermo image based on the coordinate information that combines the coordinates of both captured images and the above temperature measurement position information. The range to be acquired may be limited.

As a first modification of the present embodiment, the authentication devices 20a and 20b control the completion of the authentication process in accordance with the imaging of the thermo cameras 30a and 30b capable of acquiring the body temperature information and the completion of the acquisition of the temperature information. May be good. Specifically, for example, the authentication process is completed by the authentication devices 20a and 20b (processing time) so that the authentication process is completed after the time required for acquiring the body temperature information by the thermo cameras 30a and 30b has elapsed. Etc.) can be controlled. As a result, the subject who has completed the authentication before the body temperature information is acquired does not move through the entrance gate 2a and the entrance / exit 2b, so that the body temperature information can be reliably acquired from the thermo image. can.

Further, as a second modification of the present embodiment, the display unit 60 capable of displaying the image pickup range by the thermo cameras 30a and 30b on the screen is arranged at a position where the face is visually recognized by the target person whose face is imaged by the thermo cameras 30a and 30b. May be done. Specifically, for example, the display unit 60 may be arranged on a wall surface or the like in the vicinity of the thermo camera 30b and the authentication camera 10b at the entrance / exit 2b as shown in FIG. 7. As a result, the certified subject can easily turn his / her face to the thermo cameras 30a and 30b so as to easily acquire the body temperature information, so that the body temperature information can be reliably acquired from the thermo image.

In particular, as shown in FIG. 8, the display screen of the display unit 60 may display the temperature measurement range 61 corresponding to the range in which the body temperature information is acquired in the thermo image. As a result, the subject who has received the certification turns his face toward the thermocameras 30a and 30b so that the temperature measuring part such as the forehead matches the temperature measuring range 61, and the temperature measuring devices 40a and 40b display the temperature measuring position information. Since the range in which the body temperature information is acquired in the thermo image can be limited without using the thermo image, not only the body temperature information can be reliably acquired from the thermo image, but also the processing load required for acquiring the body temperature information can be reduced.

[Second Embodiment]
Next, the body temperature measurement system according to the second embodiment will be described with reference to the drawings.
The second embodiment is mainly different from the first embodiment in that one thermo camera is prepared for a plurality of authentication devices. Therefore, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the body temperature measurement system 1a according to the present embodiment, the authentication process of the subject passing through the plurality of gates is performed for each gate, and one thermo camera is arranged so as to simultaneously image each subject to be authenticated. It is composed of. Specifically, as shown in FIG. 9, authentication devices 70a to 70c using an IC card in which target person identification information and the like are recorded are provided in each of the three entrance gates 3a to 3c, and each authentication device 70a is provided. One thermo camera 80 is arranged so that the subject to be authenticated by each of ~ 70c can be imaged at the same time.

Each authentication device 70a to 70c collates the target person identification information or the like read from the IC card held by the target person, and when the authentication is successful, identifies the target person identification information or the like at the authentication time and the authentication devices 70a to 70c. It is configured to be transmitted to the management device 50 in association with the authentication unit specific information. Further, each authentication device 70a to 70c transmits permission information for permitting passage to the corresponding entrance gates 3a to 3c when the authentication is successful.

The thermo camera 80 is arranged so that the imaging range includes the face of the subject to be authenticated by each of the authentication devices 70a to 70c, and the thermo images in the imaging range are sequentially generated and transmitted to the management device 50 together with the imaging time. It is configured to do.

In the management device 50 of the present embodiment, each time the target person identification information, the authentication time, and the authentication unit identification information are received from the authentication devices 70a to 70c, the storage unit 52 adds the target person identification information and the like. The database is updated. Further, in the management device 50, when a thermo image having an imaging time that is substantially the same as the authentication time stored as described above is received from the thermo camera 80, the thermo image is specified from the authentication unit specific information in the thermo image. The body temperature information is acquired from a predetermined temperature measurement range based on the authentication device (70a to 70c). Then, the database of the storage unit 52 is updated so as to add this body temperature information in association with the target person identification information associated with the authentication time. The predetermined temperature measurement range based on the above-mentioned authentication devices 70a to 70c is set in advance for each authentication device 70a to 70c so as to include the face of the user who holds the IC card over the authentication devices 70a to 70c. ing. Further, the management device 50 stores the "acquisition unit" that acquires the body temperature information regarding the temperature of the face of the target person specified from the target person specific information from the thermo image, the target person specific information, and the body temperature information in association with each other. It can correspond to an example of "memory unit".

As described above, in the present embodiment, the authentication devices 70a to 70c as a plurality of authentication units that perform the authentication process of the target person passing through the plurality of entrance gates 3a to 3c for each gate, and the authentication devices 70a to 70c respectively. The thermo camera 80 that can simultaneously image the target person to be authenticated, and the target person identification information that can identify the target person authenticated by each of the authentication devices 70a to 70c, the authentication time, and the thermo camera 80 to capture the thermo image. Based on the imaging time of the image, the body temperature information regarding the temperature of the target person's face specified from the target person specific information is acquired from the above thermo image, and the target person specific information and the body temperature information are associated and stored in the database. A management device 50 having a storage unit 52 is provided.

With respect to one authentication unit specific information, the body temperature information acquired from the thermo image at the imaging time that substantially matches the authentication time is the authentication device (70a to 70c) specified from the one authentication unit specific information at the authentication time. It can be the measurement result of the subject certified in. Therefore, even if a plurality of people appear in the thermo image, it is difficult for the management device 50 to store the body temperature information other than the authenticated target person, so that the body temperature of the target person measured using the thermo image is measured. The accuracy can be improved and the reliability of the database in which the subject's body temperature information is stored can be improved. In particular, since it is not necessary to provide a thermo camera for each of the entrance gates 3a to 3c, it is possible to reduce the system introduction cost and the like as compared with the case where a thermo camera is provided for each of the entrance gates 3a to 3c.

As a modification of the present embodiment, the management device 50 divides the thermo image captured by the thermo camera 80 into each of a plurality of entrance gates 3a to 3c, and the target person is selected from each of the divided thermo images. Body temperature information regarding the temperature of the face of the subject specified from the specific information may be acquired. As a result, for example, the target person identification information of the target person authenticated by the entrance gate 3a and the body temperature information acquired from the thermo image of the target person's face authenticated by the entrance gate 3b are not erroneously associated with each other. , The reliability of the database in which the subject's body temperature information is stored can be further improved.

Further, the management device 50 is not limited to acquiring body temperature information from the thermo image as described above every time a thermo image having an imaging time that is substantially the same as the authentication time is received, but is received from the thermo camera 80. The thermo images may be sequentially stored in the database, and the body temperature information may be acquired from the already stored thermo images by a specified amount later.

[Third Embodiment]
Next, the body temperature measurement system according to the third embodiment will be described with reference to the drawings.
The third embodiment is mainly different from the first embodiment in that a temperature measurement standard is provided within the imaging range of the thermo camera in order to improve the accuracy of body temperature measurement. Therefore, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the present embodiment, a heating element 90 that generates heat at a predetermined temperature (for example, 40 ° C.) is arranged in order to set a temperature measurement reference range in the thermo image within the respective imaging ranges of the thermo cameras 30a and 30b. To. Further, an information code 91 for optically readable information regarding the position of the heating element 90 is arranged near each heating element 90 as an identification display indicating the position of the heating element 90.

Specifically, for example, as illustrated in FIG. 10, the heating element 90 and the information code 91 are arranged so as to be located near the face of the subject M at the time of authentication in the imaging range of the thermo camera 30a. ..

Thereby, for example, in the authentication device 20a, the position of the heating element 90 based on the information code 91 can be acquired by decoding the information code 91 imaged by the authentication camera 10a, and the heating element 90 can be obtained. The heating element position information regarding the position can be instructed to the temperature measuring device 40a together with the temperature measuring position information. Then, in the temperature measuring device 40a, the thermo image received from the thermo camera 30a is temperature-corrected assuming that the range specified from the heating element position information is the predetermined temperature, and then the range specified from the temperature measuring position information. The corrected temperature can be measured and acquired, and the measurement result can be output to the authentication device 20a as body temperature information.

As described above, in the present embodiment, since the heating element 90 that generates heat at a predetermined temperature is arranged within the imaging range of the thermo cameras 30a and 30b, a range that serves as a temperature measurement reference in the thermo image can be set, and thus the body temperature. The measurement accuracy can be improved.

In particular, since the information code 91 that optically readable information about the position of the heating element 90 is arranged as an identification display indicating the position of the heating element 90 near the heating element 90, the information code is arranged in the thermo image. Since the range occupied by the heating element 90 can be easily detected from the range occupied by 91, it is possible to prevent misidentification of another heat source or the like as the heating element 90. In particular, even when the position of the heating element 90 changes, the information code 91 may be generated so that the information about the changed position is recorded, so that the degree of freedom regarding the arrangement of the heating element 90 can be increased.

The identification display arranged near the heating element 90 is not limited to the information code 91 in which the information regarding the position of the heating element 90 is optically readable and recorded, and the shape and color are easily visible. It may be arranged as another display consisting of such as. Even in this way, since the range occupied by the heating element 90 can be easily detected from the range occupied by the identification display in the thermo image, it is possible to prevent misidentification of another heat source or the like as the heating element 90.

Further, the above-mentioned identification display such as the information code 91 is not limited to being arranged near the heating element 90, and may be directly added to the heating element 90. Even in this case, since the range occupied by the heating element 90 can be easily detected from the range occupied by the identification display in the thermo image, not only can it be difficult to misidentify another heat source or the like as the heating element 90, but also heat generation is generated. The degree of freedom regarding the arrangement of the body 90 can be increased.

Further, the identification display may be configured to light or blink in a predetermined light emitting state. This makes it easier to detect the range occupied by the identification display in the thermo image.

As a modification of the present embodiment, instead of the heating element 90 and the information code 91, a temperature sensor capable of notifying the measurement result of the temperature at a specific position within the imaging range of the thermo cameras 30a and 30b together with the information on the specific position is provided. May be done. This temperature sensor measures, for example, the temperature of a position near the body temperature on the outer surface of the authentication device or the temperature measuring device as the specific position, and the measurement result is transmitted with Bluetooth (registered trademark) communication together with information on the specific position. It can be configured to wirelessly transmit to the temperature measuring device by using the above. In this way, by receiving the measurement result of the temperature at the specific position from the temperature sensor together with the information about the specific position, the specific position can be set as the temperature measurement reference in the thermo image, so that the body temperature measurement accuracy can be improved.

The characteristic configuration using the identification display such as the heating element 90 and the information code 91 and the temperature sensor described above can also be applied to the second embodiment and the like.

[Other embodiments]
The present invention is not limited to each of the above embodiments, and may be embodied as follows, for example.
(1) In the first embodiment or the like, a device having both the function of the authentication device 20a and the function of the temperature measuring device 40a may be adopted instead of the authentication device 20a and the temperature measuring device 40a. Similarly, a device having both the function of the authentication device 20b and the function of the temperature measuring device 40b may be adopted instead of the authentication device 20b and the temperature measuring device 40b.

(2) As the plurality of authentication devices adopted in the second embodiment and the like, not only the three authentication devices 70a to 70c using IC cards are adopted as described above, but also two or four or more authentication devices are used. The device may be adopted, or another authentication method, for example, an authentication device using an information code displayed on the employee ID card may be adopted.

(3) The present invention is not limited to being adopted in a body temperature measurement system that automatically measures and manages body temperature at the time of authentication at the entrance gate 2a, the entrance / exit 2b, and the entrance gates 3a to 3c, and is not limited to a predetermined body temperature measurement system that requires authentication. It may be adopted in a body temperature measurement system that measures the body temperature of a subject or the like at a place and creates a database.

1,1a ... Body temperature measurement system 2a, 3a-3c ... Entrance gate 2b ... Doorway 10a, 10b ... Authentication camera 20a, 20b ... Authentication device (authentication unit)
30a, 30b ... Thermo camera (thermography camera)
40a, 40b ... Temperature measuring device (acquisition unit)
50 ... Management device (storage unit)
60 ... Display unit 61 ... Temperature measurement range 70a to 70c ... Authentication device (authentication unit)
80 ... Thermo camera (thermography camera)
90 ... Heating element 91 ... Information code

Claims (14)

An authentication camera that captures the subject's face and
An authentication unit that performs authentication processing of the target person using the face image of the target person captured by the authentication camera, and an authentication unit.
A thermography camera that captures the face of the subject to whom the authentication process is performed by the authentication unit, and
An acquisition unit that acquires body temperature information regarding the temperature of the subject's face from a thermography image taken by the thermography camera, and an acquisition unit.
A storage unit that stores the target person identification information that can identify the target person authenticated by the authentication unit and the body temperature information acquired by the acquisition unit in association with each other.
A body temperature measurement system characterized by being equipped with. The body temperature according to claim 1, wherein in the storage unit, in addition to the target person identification information and the body temperature information, information regarding the place and time when the authentication process is performed is associated and stored. Measurement system. The body temperature measurement according to claim 1 or 2, wherein the authentication unit controls the completion of the authentication process in accordance with the imaging of the thermography camera capable of acquiring the body temperature information and the completion of acquisition of the temperature information. system. The body temperature according to any one of claims 1 to 3, wherein the acquisition unit limits the range of acquiring the body temperature information from the thermography image based on the face image used in the authentication process. Measurement system. One of claims 1 to 4, wherein the display unit capable of displaying the imaging range of the thermography camera on the screen is arranged at a position where the face is imaged by the thermography camera and is visible to the subject. The body temperature measurement system described in the section. The body temperature measurement system according to claim 5, wherein a temperature measurement range corresponding to a range for acquiring the body temperature information in the thermographic image is displayed on the display screen of the display unit. A plurality of authentication units that perform authentication processing for a target person passing through a plurality of gates for each gate, and
A thermography camera capable of simultaneously capturing an image of the target person whose authentication process is performed by the plurality of authentication units.
The subject identified from the subject identification information based on the subject identification information and the authentication time capable of identifying the target person, which are each authenticated by the plurality of authentication units, and the imaging time when the thermography image is captured by the thermography camera. An acquisition unit that acquires body temperature information regarding the temperature of the subject's face from the thermography image, and
A storage unit in which the subject specific information and the body temperature information are associated and stored, and
A body temperature measurement system characterized by being equipped with. The seventh aspect of the present invention is characterized in that the acquisition unit acquires body temperature information regarding the temperature of the face of the target person specified from the target person identification information from the thermographic image divided for each of the plurality of gates. The described body temperature measurement system. The body temperature measuring system according to any one of claims 1 to 8, wherein a heating element that generates heat at a predetermined temperature is arranged within the imaging range of the thermography camera. The body temperature measuring system according to claim 9, wherein an identification display indicating the position of the heating element is arranged near the heating element. The body temperature measuring system according to claim 9, wherein an identification display indicating the position of the heating element is added to the heating element. The body temperature measuring system according to claim 10 or 11, wherein the identification display is an information code in which information regarding the position of the heating element is optically readable and recorded. The body temperature measuring system according to claim 10, wherein the identification display is lit or blinks in a predetermined light emitting state. The body temperature measuring system according to any one of claims 1 to 7, wherein a temperature sensor capable of notifying the measurement result of the temperature at a specific position within the imaging range of the thermography camera together with the information about the specific position is provided. ..

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