JP2014135993A - Body temperature measuring device, body temperature measuring method and body temperature management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device that can quickly and easily measure accurate body temperature having a high correlation with armpit temperature, etc. of a person to be measured and can link measurement data with an electronic medical record upon digitizing the data.SOLUTION: A body temperature measuring device 10A comprises: an infrared light detection part 11 that detects infrared light emitted from the neck of a person M1 to be measured and outputs a light receiving signal; and a peak value determination part that determines that a peak value of temperature obtained from the light receiving signal shows the body temperature of the person M1 to be measured.

Description

  The present invention relates to, for example, a body temperature measuring device and body temperature measuring method for measuring the body temperature of a large number of subjects, and a body temperature management system used for managing the body temperatures of subjects.

  Conventionally, body temperature measurement of a measurement subject is regularly performed in many facilities. As this person to be measured, there are inpatients, disabled persons, bedridden patients and the like. When measuring body temperature, a measurer such as a nurse or a facility staff put a thermometer under his / her armpit and measured the body temperature of the subject over several tens of seconds to several minutes.

[1. Current status and issues of contact and non-contact thermometers]
In conventional body temperature measurement, one of the following two types of contact thermometers is often used. Although each thermometer currently has the following uses, unique problems have occurred.
(1-1) Armpit thermometer The armpit thermometer is a thermometer that measures the body temperature by contacting the armpit of the subject. However, when the measurement subject is an elderly person or a disabled person, it may be difficult to move the arm. Also, since the thermometer comes into contact with the skin, the thermometer must be sterilized for each measurement. In addition, since it takes several tens of seconds to several minutes for one measurement time, when the body temperature is measured while the person being measured is sleeping, the patient's sleep may be disturbed.

(1-2) Ear-type thermometer An ear-type thermometer is a thermometer that is inserted into the ear of the measurement subject and measures the body temperature in order to measure the temperature at the back of the ear that is not easily affected by the outside air temperature. However, when the person being measured is a child such as an infant, there are cases where he / she does not want to put a foreign object in the ear. In addition, it is difficult to measure the body temperature by accurately applying a thermometer to the eardrum of the measurement subject. As for the ear thermometer, since the thermometer contacts the skin, the thermometer must be sterilized for each measurement.

  In order to solve the problems that occur in the contact thermometer, a non-contact thermometer that can easily and accurately measure the body temperature has been demanded instead of the contact thermometer. Among the various types of non-contact thermometers that have been proposed so far, the infrared skin thermometer that detects body temperature by detecting infrared light emitted from the subject's skin has been relatively developed. is there.

(1-3) Infrared skin thermometer An infrared skin thermometer is a thermometer that measures the skin temperature of the forehead mainly by infrared rays and converts it into an armpit temperature using a predetermined calculation formula (for example, No. 3,863,919 (see “Infrared Thermometer with Optical Aiming System”).

  However, the correlation between the forehead and the armpit temperature is low because the individual difference is large (see FIG. 4 described later). Moreover, since the forehead is exposed to the outside air and is easily affected by the environmental temperature, the temperature value obtained by converting the skin temperature of the forehead has a larger error than the actually measured armpit temperature. The reason for this is that, for example, the armpit hidden in clothing has little temperature change due to changes in the outside temperature, but the face and forehead are exposed to the outside air, and the face temperature fluctuates greatly even with slight changes in the outside temperature. It is easy to do.

  Similar to an infrared skin thermometer, there is a thermography device that can detect temperature by detecting infrared light. The thermography device enhances the visibility of the temperature distribution by a thermal image that is color-coded such that the high temperature is red and the low temperature is blue according to the intensity of infrared light emitted from the skin of the measurement subject. Conventionally, a thermographic apparatus has been used in the following manner in measuring skin temperature.

(2-1) Medical Thermography Conventionally, medical thermography is known in which a subject is photographed with an infrared camera and the temperature distribution of the whole body surface temperature of the subject is displayed. Using this medical thermography, a doctor or the like can perform image diagnosis of an abnormal part (blood circulation disorder, chronic pain, inflammation, tumor, etc.).
However, medical thermography performs image diagnosis using a thermal image showing a temperature distribution, and is not accepted as a thermometer. In addition, since medical thermography is expensive, it has been difficult to spread as a thermometer.

(2-2) Body surface temperature screening Conventionally, a thermography device specialized in body surface temperature screening for continuously measuring the body surface temperature of a large number of subjects has been known. For example, this thermographic device is designed to identify the fever among a large number of passers-by at a single measurement, and to prevent the influx of new influenza, such as at the airport, harbor, facility, etc. Temperature was measured, and people with higher temperatures were extracted from comparison with others.

  However, as with the infrared skin thermometer, the armpit temperature measured with the thermometer held under the armpit of the subject and the temperature of the face or forehead of the subject measured using thermography often do not match. For this reason, simply measuring the temperature of the face of the person to be measured cannot accurately measure the body temperature of the person to be measured, and even if the body surface temperature screening is performed, the fever can be identified immediately from the measured value. It was difficult.

Under such circumstances, Patent Document 1 discloses a body temperature inspection device as a device for inspecting the body temperature of a measurement subject with higher accuracy using a thermography device. This body temperature inspection device is equipped with a visible camera and a thermography device, and generates heat from the difference between the temperature of the face measured using infrared rays and the temperature in the oral cavity according to the face of the person photographed with the visible camera. Is specified.
However, the body temperature test apparatus disclosed in Patent Document 1 cannot accurately measure the body temperature because it eventually refers to the body temperature estimated from the temperature of the face and the temperature in the oral cavity. For this reason, the value measured using the body temperature test | inspection apparatus disclosed by patent document 1 was only handled to the reference grade to the last. Moreover, such a body temperature inspection apparatus is large-scale and cannot be used in a medical examination performed at a medical site or the like.

JP 2011-67371 A

[2. Current situation and issues in hospitals where body temperature is measured]
Conventionally, body temperature measurement performed in hospitals, etc. requires physical strength, especially for those who have many subjects, such as making the body of the subject to be measured and fixing the thermometer so that it does not shift and waiting for a while. It was work. Further, the subject had to wait for a while with the same posture until the measurement was completed with a foreign object inserted in the side, which caused stress.

  Moreover, the body temperature value which the measurer measured on the medical chart by handwriting was written after the measurement. However, it takes a lot of work to enter the temperature measured by the thermometer in the medical chart in this way, and there is a possibility that an error in writing will occur. Further, when hospitals, facilities, etc. manage medical records with electronic data, it is necessary to re-enter the description contents of medical records using a PC (Personal Computer) or the like, which is troublesome.

  In addition, there are cases where dozens of subjects are admitted to hospitals and welfare facilities, for example, but it is a heavy burden to measure the temperature of everyone at regular intervals and manage the measured temperature. It was. In addition, the measuring device specialized for body surface temperature screening only measures the temperature of the skin surface of the face of the person being measured, and is easily affected by the environmental temperature where the person to be measured exists. Furthermore, the armpit temperature obtained by converting the skin temperature obtained from the subject's forehead and face using a calculation formula is different from the actually measured body temperature, and accurate body temperature measurement can be performed. There wasn't.

  The present invention has been made in view of such a situation, and accurately measures a body temperature having a high correlation with the measurement subject's armpit temperature, etc. in a short time, and digitizes the measurement data with an electronic medical record. The purpose is to cooperate.

  The body temperature measurement device according to the present invention includes an infrared light detection unit that detects infrared light emitted from the neck of the measurement subject and outputs a light reception signal, and a temperature peak value obtained from the light reception signal is determined as the body temperature of the measurement subject. A peak value determining unit for determining.

  Further, the body temperature management method according to the present invention includes a step of detecting infrared light emitted from the neck of the measurement subject and outputting a light reception signal, and determining a peak value of the temperature obtained from the light reception signal as the body temperature of the measurement subject. And a step of performing.

In addition, a body temperature management system according to the present invention includes a body temperature measurement device that measures the body temperature of the measurement subject, and a management server that manages the body temperature of the measurement subject collected from the body temperature measurement device.
The body temperature measuring device includes an infrared light detection unit that detects infrared light emitted from the skin on the carotid artery of the subject's neck and outputs a light reception signal; and a temperature peak value obtained from the light reception signal is measured by the subject. A peak value determination unit for determining body temperature, an identification unit for identifying the measurement subject by identification information uniquely assigned to the measurement subject, and measurement data including the measurement subject's body temperature for each identified measurement subject. And a first communication unit that transmits to the management server.
The management server includes a second communication unit that receives the body temperature of the person to be measured from the body temperature measuring device, a totaling unit that counts the body temperature read from the recording unit for each person to be measured and obtains a totaling result, and displays the totaling result A display unit.

  According to the present invention, there is provided a body temperature measuring device for the subject to measure the subject's body temperature, which is highly correlated with the subject's armpit temperature, which is obtained from infrared light emitted from the subject's neck. Does not touch and does not stress the subject. In addition, the measurement data including the measured body temperature is transmitted from the body temperature measurement device to the management server in a state identified for each person to be measured by the identification information, and is managed by the management server. Cooperation becomes easy.

It is explanatory drawing which shows the external structural example of the body temperature management system in the 1st Example of this invention. It is a block diagram which shows the example of an internal structure of the body temperature measuring apparatus in the 1st Example of this invention. It is a block diagram which shows the example of an internal structure of the management server in the 1st Example of this invention. It is the figure which showed the example of a correlation with the measured value of the surface temperature of the to-be-measured person's forehead measured using the conventional thermography, and the armpit temperature of the to-be-measured person. It is explanatory drawing which shows the example of the location which measures body temperature using the body temperature measuring apparatus in the 1st Example of this invention. It is explanatory drawing which shows the example of a correlation with the measured value of the surface temperature of the measurement area | region of a to-be-measured person measured using the body temperature measuring apparatus in the 1st Example of this invention, and the armpit temperature of a to-be-measured person . It is explanatory drawing which shows the external structural example of the body temperature management system in the 2nd Example of this invention. It is a block diagram which shows the internal structural example of the body temperature measuring apparatus in the 2nd Example of this invention. It is explanatory drawing which shows the example of the thermal image of the to-be-measured person imaged using the body temperature measuring apparatus in the 2nd Example of this invention. It is the schematic which shows the structural example of the infrared light detection part which concerns on the modification of this invention.

<1. First Embodiment>
Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described. First, a configuration example of a body temperature management system 1A according to the first embodiment of the present invention will be described with reference to FIGS.
This body temperature management system 1A realizes a body temperature management method performed by the internal blocks shown in FIG. 2 and FIG. In the present specification and drawings, components having substantially the same function or configuration are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is an explanatory diagram illustrating an external configuration example of the body temperature management system 1A.
The body temperature management system 1A includes a body temperature measurement device 10A that measures the body temperature of the measurement subject M1, and a management server 20 that manages the body temperature of the measurement subject M1 collected from the body temperature measurement device 10A. Here, an outline of configurations and functions of the body temperature measurement device 10A and the management server 20 will be described.

  The body temperature measurement device 10 </ b> A includes an infrared light detection unit 11 and a display unit 12. The infrared light detection unit 11 includes a common carotid artery, an internal carotid artery, and an external carotid artery (hereinafter referred to as “carotid artery” or “carotid artery (total, internal, external))” of the neck of the measurement subject M1 in the detection range in the figure. Infrared light emitted from the upper skin is detected and the body temperature of the measurement subject M1 is measured.

  The infrared light detection unit 11 includes an infrared sensor 11a. A plurality of infrared light detection elements (not shown) constituting the infrared sensor 11a are arranged in a two-dimensional plane, and are exposed from the clothes of the measurement subject M1 when the body temperature measurement device 10A is directed to the measurement subject M1. It detects infrared light emitted from the neck and outputs a light reception signal. The light receiving signal is converted into a temperature value by the control unit 15 (see FIG. 2 described later). For this reason, conventionally, the body temperature is measured by inserting a thermometer under the arm of the person to be measured M1, but if this body temperature measuring device 10A is used, the body temperature of the person to be measured M1 can be measured without touching the person to be measured M1. It can be displayed on the display unit 12. Then, the body temperature measuring device 10A wirelessly transmits the body temperature measurement data of the measurement subject M1 to the management server 20. The body temperature management system 1A may be configured such that the body temperature measurement device 10A transmits the measurement data to the management server 20 by wire.

  The management server 20 includes an operation unit 21 that can be operated and input by a measurer, and a display unit 22 that is formed by a liquid crystal display panel or the like and can display a total result of body temperature measured by the measurement subject M1. The operation unit 21 includes a keyboard, a mouse, and the like. The management server 20 performs a predetermined totaling process on the measurement data wirelessly received from the body temperature measuring device 10A, and displays the totaling result of the body temperature for each person to be measured M1.

  Next, detailed internal configuration examples of the body temperature measurement device 10 </ b> A and the management server 20 will be described with reference to FIGS. 2 and 3.

FIG. 2 is a block diagram illustrating an internal configuration example of the body temperature measurement device 10A.
The infrared light detection unit 11 included in the body temperature measuring device 10A includes an infrared sensor 11a that receives infrared light and outputs a light reception signal that is analog data, an amplifier 11b that amplifies the light reception signal, and the amplified light reception signal as digital data. And an A / D conversion unit 11c for converting into The body temperature measurement device 10A includes a display unit 12 that digitally displays the measurement values.

  The body temperature measuring device 10A performs wireless communication according to a predetermined communication standard between the time measuring unit 13 that manages the measurement time and measurement time and the management server 20, and a LAN (Local Area Network) laid in a hospital or the like. And a first communication unit 14 connected to.

  The body temperature measurement device 10 </ b> A includes a control unit 15 that controls each unit, and a memory 16 that stores the converted digital measurement values according to the time series obtained from the time measuring unit 13. This control part 15 is provided with the peak value determination part 15a which determines the peak value of the temperature calculated | required from the received light signal as a body temperature of a to-be-measured person. The peak value determination unit 15a holds the highest value for a predetermined time in the memory 16 when the highest value among the received light signals output from the infrared sensor 11a is obtained (referred to as “peak hold”). . The predetermined time for holding the value in the memory 16 is, for example, the time required for one body temperature measurement (about 5 seconds). When a value higher than the value held in the memory 16 is obtained within a predetermined time, the held value is replaced with the obtained value. If there is no change in the peak value within the predetermined time, the peak value determination unit 15a determines that this peak value is the body temperature value of the person to be measured M1, and stores it in the memory 16.

  Here, the size of the neck of the measurement subject M1 is wider than the detection range of the infrared sensor 11a. By determining the predetermined time for peak hold in advance, the measurer moves the body temperature measuring device 10A directed toward the subject M1 to move the detection range of the infrared sensor 11a, and in the neck of the subject M1 The peak value can be searched. The highest peak value can be measured as the body temperature of the person to be measured M1. When determining the peak value, the control unit 15 causes the display unit 12 to display the updated peak value so that the body temperature value measured by the measurer can be easily seen. Note that the peak value is erased from the memory 16 by the control unit 15 upon receiving an erasure instruction from the operation unit 17 operated by the measurer.

  The first communication unit 14 is connected to a wireless LAN using a predetermined communication method, and transmits measurement data including the body temperature of the measured person M1 to the management server 20 for each identified measured person M1. In addition, the body temperature measuring device 10A can receive the body temperature value and the like of the past measurement subject M1 from the management server 20 via the wireless LAN.

  The body temperature measuring device 10A includes an operation unit 17 that is used to instruct the measurement subject M1 to start measuring the body temperature or to input information about the measurement subject M1. When inputting the information of the person to be measured M1, the operation unit 17 is used as an identification part, and the identification information uniquely given to the person to be measured M1 is used as measurement data including the body temperature of the person to be measured M1. Can be attached. It should be noted that the measurement person can press the skip button (not shown) or the like provided on the operation unit 17 so that the information of the measurement subject M1 is not associated with the measurement data.

FIG. 3 is a block diagram illustrating an internal configuration example of the management server 20.
In addition to the operation unit 21 and the display unit 22 described above, the management server 20 is connected to a wireless LAN and receives a measurement data from the body temperature measuring device 10A, a control unit 24, and a body temperature measuring device. And a recording unit 25 that records the body temperature value of each measurement subject M1 collected from 10A. The recording unit 25 is configured by a large-capacity hard disk drive or the like, and can record a large amount of measurement data.

  The control unit 24 collects the body temperature value of the measurement subject M1 wirelessly transmitted by the body temperature measurement device 10A via the wireless LAN, and records the collected body temperature value in the recording unit 25. In addition, the control unit 24 can display the body temperature value of the measurement subject M1 read from the recording unit 25 on the display unit 22 in time series, and can indicate the change in body temperature of the measurement subject M1 in a predetermined period.

  The control unit 24 includes a totaling unit 24a. The totaling unit 24a aggregates the body temperature of the measurement subject M1 read from the measurement data for each measurement subject M1, and obtains a total result. The total result is displayed on the display unit 22, or transmitted to the body temperature measuring device 10A and displayed on the display unit 12 of the body temperature measuring device 10A.

  Here, the difference between the body temperature measuring method using the conventional thermography and the body temperature measuring method according to the present embodiment will be described with reference to FIGS.

  FIG. 4 is a diagram showing a correlation example between the measured value of the forehead surface temperature of the person to be measured M1 measured using conventional thermography and the armpit temperature of the person to be measured M1.

  Since the forehead of the measurement subject M1 is exposed from the clothes, it is lower than the armpit temperature due to the influence of the outside air temperature. The straight line L1 shown in FIG. 4 is a straight line when the body temperature and the measured temperature are equal. The straight line L2 is a primary approximate straight line obtained from the measured value of the armpit temperature of the measurement subject M1 and the measured value of the forehead.

For example, while the armpit temperature is distributed in the range of 35.5 ° C to 37.0 ° C, the measured value of the forehead surface temperature is distributed in the range of 33.0 ° C to 35.5 ° C. ing.
In this case, the straight line L2 is represented by the following formula (1), the square of the correlation coefficient _{R 1} becomes 0.22.
y = 0.56x + 14.12 (1)
In this case, there is no significant correlation between the armpit temperature and the forehead surface temperature. For this reason, when trying to obtain the armpit temperature from the surface temperature of the forehead, it is necessary to perform a correction by multiplying the measured value of the surface temperature of the forehead by a predetermined correction coefficient, and the value after correction is also unreliable. .

  Here, in the body temperature measuring apparatus 10A according to the present embodiment, (3-1) a function of performing a new body temperature measurement, which will be described later, and (3-2) a function of associating measurement data with each individual and transferring the data. It is characterized by having. Hereinafter, a method of measuring with the body temperature measuring device 10A will be described.

FIG. 5 is an explanatory diagram illustrating an example of a location where body temperature is measured using the body temperature measuring device 10A.
As a result of measuring various parts of the subject M1, the inventor found a part where the body temperature of the subject M1 can be measured without imposing the most burden on both the subject M1 and the measurer.

(3-1) Method of measuring body temperature This part is the front neck exposed from the face of the person to be measured M1 to the neck when the person to be measured is viewed from the front, using the body temperature measuring device 10A. The temperature distribution on the body surface of the part is obtained. Specifically, the maximum temperature in a region including at least a substantially quadrangular region (hereinafter referred to as a “measurement region”) formed by a ridge line made of trapezius, a ridge line made of clavicle, and a lower cervical edge. The point is searched for its temperature and used as an alternative temperature for the armpit temperature of the subject. By determining the measurement region in this way, the maximum temperature in the neck of the measurement subject can be reliably obtained.

  Furthermore, when the peak value determination unit 15a holds the maximum temperature in a peak, the accuracy of acquiring the maximum temperature in the measurement region can be increased. This is because the carotid artery (total, inner, outer) that transmits central body temperature well exists in the vicinity of the epidermis, and the autonomic innervated capillaries that are disturbance factors of the epidermis are This is due to the fact that it has fewer features and less sweating. For this reason, the numerical value (body temperature value of the person to be measured M1) can be measured which is not easily affected by the temperature and stress and has a very high correlation with the armpit temperature.

FIG. 6 is an explanatory diagram showing a correlation example between the measured value of the surface temperature of the measurement region of the measurement subject M1 measured using the body temperature measurement device 10A and the armpit temperature of the measurement subject M1.
The straight line L1 shown in FIG. 6 is the same as the straight line L1 shown in FIG. The straight line L3 is a first-order approximate straight line obtained from the measured value of the armpit temperature of the measurement subject M1 and the maximum value of the neck temperature of the measurement subject M1 measured using the body temperature measurement device 10A.

The measurement area of the measurement subject M1 is a part exposed from the clothes, but is not easily affected by the outside air temperature. For this reason, while the armpit temperature is distributed in the range of 35.5 ° C to 39.0 ° C, the surface temperature of the measurement region is also distributed in the range of 35.5 ° C to 39.0 ° C. Yes.
In this case, the straight line L3 is represented by the following formula (2), the square of the correlation coefficient _{R 2} is 0.95.
y = 0.97x + 0.98 (2)
The armpit temperature and the surface temperature of the measurement region are almost the same value, and a strong correlation is recognized. For this reason, even if it does not correct | amend the surface temperature of a measurement area | region, the surface temperature of a measurement area | region can be handled as it is the armpit temperature.

(3-2) Function for Linking Measurement Data Individually and Transferring Data The body temperature measurement device 10A according to the first embodiment does not have a camera or the like, and a measured person M1 as will be described later It is impossible to read a two-dimensional code or the like attached to a bed or the like that is sleeping. However, the measurement person operates the operation unit 17 during measurement and inputs the information (room number, ID, etc.) of the measurement subject M1 to identify the measurement subject M1, and the measured temperature of the measurement region is measured. Information of the measurer M1 can be associated. Thereafter, the body temperature measuring apparatus 10A transmits, to each management subject 20, measurement data including the measured surface temperature of the measurement region and information about the subject M1. Thereby, the management server 20 can automatically total the surface temperatures of the measurement regions measured for each measurement subject M1 read from the collected measurement data.

  In addition, in a hospital room or the like where the use of wireless communication is restricted, the memory 16 can be removed from the body temperature measuring device 10A, and data can be written in the memory 16 offline. Thereafter, the memory 16 removed from the body temperature measuring device 10A may be connected to the management server 20 so that the management server 20 reads the measurement data. For this reason, it becomes possible to measure body temperature without giving the influence by transmitting / receiving electromagnetic waves to other electronic devices in the room.

  By using the body temperature measuring device 10A according to the first embodiment described above, the surface temperature of the measurement region near the neck of the measurement subject M1 is measured in real time without contact, and the measurement subject can be measured in a short time. It becomes possible to measure the body temperature of M1. At this time, the infrared sensor 11a measures the maximum temperature in the measurement region having a high correlation with the armpit temperature without contact. The neck, like the armpit, has few capillaries around it and is less susceptible to psychological and environmental temperature fluctuations. For this reason, if the circumference of the neck is covered with clothes or the like before measurement, the same value as that of the armpit can be obtained. In addition, by peak-holding the maximum temperature value within a certain time, the maximum temperature in the measurement region can be obtained and the correlation with the armpit temperature can be increased.

  Further, since the body temperature measuring device 10A is not brought into contact with the person to be measured M1 when measuring the body temperature, the body temperature of a bedridden patient, a newborn, a handicapped child, etc. can be easily measured. Work and stress are reduced. Further, it is not necessary to disinfect the body temperature measuring device 10A for each measurement, and the labor of measurement work can be reduced. In the body temperature measurement, it is sufficient that the measurement subject M1 is exposed to the extent that the neck of the subject M1 can be seen, and the time for touching the subject M1 during measurement can be reduced. Moreover, since the measurement time is about several seconds, the measurement time can be greatly shortened as compared with the method of measuring using a conventional thermometer.

  Moreover, 10 A of body temperature measuring apparatuses can link | link the information of the to-be-measured person M1, and the measured body temperature by the to-be-measured person's identification function. Further, by handling the measurement values as digital data, the measurement data can be transferred to the management server 20 in real time, and the management server 20 can automatically add information to the electronic medical record. By automatically transferring and sharing the digital data in this way, the operator does not need to manually transfer the measurement value, thereby eliminating erroneous input during the transfer. Note that as a wireless communication method, other general-purpose technologies such as weak radio and low-power radio can be used. For this reason, the cost of 10 A of body temperature measuring apparatuses can be held down by using a general purpose goods for the 1st communication part 14 of 10 A of body temperature measuring apparatuses.

  Moreover, it is easy to analyze the measurement data by automatically recording the body temperature value of the measurement subject M1 in the electronic medical record. For example, by using management software, history information management, numerical analysis, image analysis, and the like can be performed. Further, by storing the measurement data in the recording unit 25 and appropriately reading out, the measurement data can be analyzed in time series for each person to be measured M1.

  The body temperature measuring device 10A may be provided with an instruction unit for instructing the measurement area of the measurement subject M1 shown in FIG. 5 so that the infrared sensor 11a receives infrared light from the measurement subject M1. . For example, a light source such as a light emitting diode or a laser is used for the instruction unit, and the instruction unit emits light toward the person to be measured M1. If the instruction unit is provided in this manner, the measurement area can be clearly shown to the measurer, and reliable body temperature measurement can be performed.

<2. Second Embodiment>
Next, a body temperature management system 1B according to a second embodiment of the present invention will be described with reference to FIGS.
The body temperature management system 1B includes a body temperature measurement device 10B and a management server 20, and takes a visible image and a thermal image of the measurement subject M1.

FIG. 7 is an explanatory diagram showing an external configuration example of the body temperature management system 1B.
The body temperature management system 1B includes a body temperature measuring device 10B and a management server 20. First, an outline of the configuration and functions of the body temperature measurement device 10B will be described.

  The body temperature measuring device 10B includes an infrared camera 31 that outputs a thermal image obtained by imaging the person to be measured M1 with infrared light, and a visible light camera 32 that outputs a visible image obtained by imaging the person M1 with visible light. Used as a thermographic device capable of displaying thermal images. Here, the infrared camera 31 is used as an example of an infrared light detection unit. The body temperature measurement device 10B includes a display unit 35 that displays a thermal image in addition to the body temperature of the measurement subject M1, superimposes a visible image on the thermal image, or displays only the visible image.

  In the visible image displayed on the display unit 35, the person to be measured M1 can be displayed as it is, but in the thermal image, the image is colored and displayed according to the intensity of the infrared light received by the imaging device of the infrared camera 31. For example, if the body surface temperature is high, it is colored with a warm color such as red, and if the body temperature is low, it is colored with a cold color such as blue.

  A two-dimensional code M2 in which information specifying the person to be measured M1 is recorded is disposed near the person to be measured M1 (for example, beside the bed). The body temperature measuring apparatus 10B can image the two-dimensional code M2 by using the visible light camera 32, decode the two-dimensional code M2 by the authentication function, extract the information on the person to be measured M1, and perform authentication.

  If a slit-like bar code is attached to the arm of the person to be measured M1 instead of the two-dimensional code M2, infrared light emitted from the skin surface of the person to be measured M1 passes through the part blocked by the slit. The part to be generated occurs. For this reason, the body temperature measuring device 10B can also decode the barcode read from the pattern of the thermal image by the infrared light that has passed through the slit, and obtain information on the measurement subject M1.

  The body temperature measuring device 10B can write and store data of a thermal image and a visible image in the memory 38. The memory 38 is detachable from the housing of the body temperature measuring device 10B. For this reason, if the memory 38 removed from the body temperature measuring device 10 </ b> B is attached to the management server 20, the management server 20 can read data directly from the memory 38. The body temperature measurement device 10B can also transmit data read from the memory 38 to the management server 20 via the wireless LAN.

FIG. 8 is a block diagram illustrating an internal configuration example of the body temperature measurement device 10B.
The infrared camera 31 includes an optical system 31a on which subject light is incident, a thermal image imaging unit 31b that outputs a thermal image signal from a subject image formed on the imaging surface by the optical system 31a, and an amplifier 31c that amplifies the thermal image signal. And an A / D converter 31d for converting the amplified thermal image signal into digital data. For example, a germanium lens is used for the optical system 31a. In addition, for example, an infrared imaging element such as a microbolometer is used for the thermal image capturing unit 31b, and digital data of the thermal image is output.

  The visible light camera 32 includes an optical system 32a on which subject light is incident, a visible image imaging unit 32b that outputs a visible image signal from a subject image formed on the imaging surface by the optical system 32a, and an amplifier 31c that amplifies the visible image signal. And an A / D converter 31d that converts the amplified visible image signal into digital data. The visible image capturing unit 32b uses an image sensor that can capture a visible image, such as a CCD or a CMOS, and outputs digital data of the visible image.

  Furthermore, the body temperature measuring device 10B includes an image processing unit 33 that performs predetermined processing on each image signal received from the infrared camera 31 and the visible light camera 32 and causes the display unit 35 to display an image based on these image signals. . The image processing unit 33 converts the thermal image captured by the thermal image capturing unit 31b into a temperature value of each unit, and performs a process of coloring according to the temperature value.

  The display unit 35 can alternately display or display the thermal image and the visible image that have passed through the image processing unit 33. By displaying the visible image on the display unit 35 in this way, the measurer can measure the body temperature while viewing the visible image as well as the thermal image. Further, the measurer can clearly grasp the position of the measurement subject M1 to be imaged by the image displayed on the display unit 35.

The body temperature measurement device 10 </ b> B includes a first communication unit 34 that performs wireless communication with the management server 20, and a time measuring unit 36 that measures a measurement time. The body temperature measuring device 10B includes a control unit 37 that controls each unit, a memory 38 that stores measurement data according to a time series obtained from the time measuring unit 36, and an operation unit 39 that allows a measurer to perform an operation input.
The memory 38 can store not only temperature values but also thermal images.

The control unit 37 includes a peak value determination unit 37a and an identification unit 37b.
The peak value determination unit 37a has the same function as the above-described peak value determination unit 15a. However, since the body temperature measurement device 10B performs image processing with a thermal image and a visible image, it acquires at least the epidermis temperature of the region including the measurement region of the measurement subject M1 as a temperature distribution image. Then, the highest temperature point in the measurement region in the temperature distribution image is searched to acquire the temperature, and is used as an alternative temperature of the body temperature measured under the measurement subject M1.

The identification unit 37b can read the two-dimensional code M2 with a visible image in order to associate the name of the person to be measured M1 with the measurement value. And the identification part 37b can extract the information of the to-be-measured person M1 by decoding the two-dimensional code M2 represented by the visible image. Further, the identification unit 37b may read information recorded on an RFID tag attached to the wristband or the like of the person to be measured M1 and acquire information on the person to be measured M1 from this information. Then, the information of the person to be measured M1 and the measurement result can be transmitted to the management server 20 via the first communication unit 34. Thereby, body temperature measurement can be started without erroneously inputting information of the person to be measured M1.
Note that the identification unit 37b may perform the face authentication of the measurement subject M1 using the visible image, and then transmit the information of the measurement subject M1 and the measurement result to the management server 20 together.

The operation unit 39 is used for switching an image to be displayed on the display unit 35 to a visible image or a thermal image, or for instructing a location to be measured as the maximum temperature of the measurement subject M1 by moving a cursor or the like.
The distance measuring unit 40 measures the distance from the measurement subject M1 as the subject to the body temperature measuring device 10B. For the distance measuring unit 40, for example, a distance measuring sensor is used.

  When the temperature is measured using the body temperature measuring device 10A at a distance of 1 m to the person to be measured M1, the viewing range of one side per pixel of the infrared detection element is defined by “mm × mm”, and the viewing angle is “mrad” (Milliradians) ”. For example, when the field-of-view range per pixel when measuring at a distance of 1 m is 1 mm × 1 mm, the viewing angle is 1 mrad. Similarly, when the field-of-view range per pixel when measuring at a distance of 1 m is 1.5 mm × 1.5 mm, the viewing angle is 1.5 mrad. Since this value is defined by an angle, the value is basically unchanged even if the measurement distance changes.

  Then, when the measurer brings the body temperature measuring device 10B closer to the subject M1, the distance measurement unit 40 approaches the subject M1 to a certain distance, and when the distance to the subject M1 reaches a predetermined value, The control unit 37 automatically starts body temperature measurement. Here, the distance at which the body temperature measurement is started is calculated backward from the visual field range per pixel of the infrared detecting element necessary for accurate measurement. Here, in order to accurately capture the skin temperature on the carotid artery (total, inner, outer) having a diameter of about 5 mm, an infrared detecting element having at least three pixels is required. The field-of-view range per pixel of the infrared detection element necessary for accurate body temperature measurement is 1.67 mm × 1.67 mm, and the spatial resolution required for this is 3.34 mrad. For this reason, when the visual field range per pixel becomes 1.67 mm × 1.67 mm or less, the body temperature measurement device 10 </ b> B automatically starts body temperature measurement. The actual measurement distance is determined from the distance that is easy for the measurer to operate from the size and specifications of the body temperature measuring device 10B, and the optical design is calculated from the back.

  When the body temperature measurement is started, the peak value determination unit 37a detects infrared light, holds the peak for a certain time, and obtains the maximum temperature in the measurement region of the measurement subject M1. However, when an abnormally high temperature is measured, such as when the amount of heat generated by an electronic device or the like is included in the thermal image, a measurement error message is displayed on the display unit 35.

  Further, by displaying a visible image near the neck of the person to be measured M1 on the display unit 35, the measurer can clearly grasp the measurement site. For this reason, anyone can easily measure the body temperature by simply bringing the body temperature measuring device 10B close to the person to be measured M1 without requiring a complicated operation.

FIG. 9 shows an example of a thermal image of the measurement subject M1 captured using the body temperature measurement device 10B.
The management server 20 records the measurement date, the maximum temperature, and the thermal image for each identification number that uniquely identifies the measurement subject M1. Here, the temperature at the position represented by the cross icon in the thermal image can be regarded as the maximum temperature of the body temperature of the person to be measured M1. For example, the maximum temperature of the measurement subject M1 whose identification number is “1” is 35.5 ° C., and the maximum temperature of the measurement subject M1 whose identification number is “2” is 35.2 ° C. Is shown. This thermal image is displayed on the display unit 35 of the body temperature measuring device 10B, and the measurer can grasp the temperature distribution from the displayed thermal image and can use it for the physical condition management of the measurement subject M1. Alternatively, measurement data including a thermal image may be transmitted to the management server 20 for management.

  According to the body temperature measuring device 10B according to the second embodiment described above, the body temperature of the measurement subject M1 is measured by displaying not only the thermal image but also the visible image on the display unit 35. It becomes easy to grasp. Then, by displaying the position where the peak value is detected together with the peak value on the display unit 35, it is indicated that the body temperature measurement was performed at the correct position.

  Further, when an abnormally high temperature generated by an electronic device or the like, or a low temperature at which the maximum temperature in the measurement range is 34 ° C. or less, an error can be displayed on the display unit 35. For this reason, it is not necessary to take in as measurement data about the part which the measurement person unintentionally photographed.

  The body temperature measurement device 10B starts measurement when the distance necessary for accurate measurement is reached based on the value of the distance to the measurement subject M1 output from the distance measuring unit 40. For this reason, by measuring the body temperature measuring device 10B sufficiently close to the person to be measured M1, it is possible to prevent a situation in which another region other than the measurement region is erroneously measured.

<3. Modification>
Note that the body temperature of the person to be measured M1 may be measured using a single (one element) infrared light detection element instead of the infrared light detection unit 11 and the infrared camera 31 described above.
FIG. 10 is a schematic diagram illustrating a configuration example of the infrared light detection unit 50. In addition, illustration is abbreviate | omitted about structures other than the infrared-light detection part 50 contained in the body temperature measuring apparatus which concerns on a modification in FIG.
The infrared light detection unit 50 includes a lens 51, a mirror 52, and an infrared sensor 53 including a single infrared light detection element. The optical path of the infrared light emitted from the positions (1) to (3) in the detection range of the measurement subject M1 is indicated by a broken line in the figure, and the temperature corresponding to each position (1) to (3) in the detection range. The positions (1) to (3) of the data 54 are shown side by side on a virtual plane.

  First, when the lens 51 condenses the infrared light emitted from the measurement subject M1, the collected infrared light is reflected toward the infrared sensor 53 by the mirror 52 that is driven at high speed. The infrared sensor 53 receives the infrared light reflected by the mirror 52 and outputs a light reception signal to a control unit (not shown). The control unit (not shown) arranges the temperature data 54 in a planar shape in accordance with the received infrared light intensity and the angle information of the mirror 52. The temperature data 54 arranged in this way is displayed as a thermal image on a display unit (not shown). In addition, even if it does not display as a thermal image, the peak value of the temperature in the to-be-measured person's M1 detection range can also be determined.

  Moreover, although the body temperature measuring device 10B according to the second embodiment described above is configured to include both the infrared camera 31 and the visible light camera 32, a configuration including only the infrared camera 31 may be employed. Even with such a configuration, the body temperature of the person to be measured M1 can be measured, the body temperature measuring device 10B can be reduced in weight, and the number of parts can be reduced.

  Further, instead of the infrared camera 31, a line scanner in which infrared imaging elements are arranged in a straight line may be used, and the peak value may be obtained from the temperature detected in the area scanned by the line scanner.

  Further, by setting the focus of the infrared camera 31 to infinity, a thermal image may be captured by the infrared camera 31 that does not have an autofocus function. Further, if the focus is fixed at an appropriate distance to the measurement subject M1, a thermal image may be taken when the subject image of the measurement subject M1 is in focus.

  Further, if the distance to the person to be measured M1 can be grasped by a ruler or pipe having a certain length, the body temperature of the person to be measured M1 can be kept at an appropriate distance even if the distance measuring unit 40 is removed from the body temperature measuring device 10B. Can be measured.

  In addition to the authentication using the two-dimensional code M2 or the RFID tag, the identification unit 37b uses biometric authentication including vein authentication using the palm vein of the measurement subject M1, iris authentication using the iris of the eyeball, and the like. It may be.

  In addition, a laser pointer or the like that emits infrared rays parallel to the optical axis of the infrared camera 31 is provided on the front surface of the body temperature measuring device 10B, and the measurement location is grasped by the bright spot that is the irradiation position of the laser pointer. Also good. However, it is necessary for the laser pointer to sufficiently reduce the output so as not to affect the eyeball.

  Further, the body temperature measuring device 10B is not only used for body temperature measurement, but also can be used for monitoring various diseases such as blood circulation disorders and inflammation by measuring the temperature distribution on the body surface of the subject M1. Become.

  The body temperature data of the measurement subject M1 collected by the management server 20 may be edited into a time-series graph or the like and displayed on the display unit 22. Further, the time series graph of the measurement subject M1 to be measured may be displayed on the display unit 35 by transmitting the time series graph to the body temperature measuring device 10B, and the trend management of the body temperature may be performed. Thereby, the measurer can confirm the transition of the body temperature of the measurement subject M1 in the past, and can determine the validity of the body temperature value to be measured.

  The series of processes in the above-described embodiment can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, it can be executed by a computer in which a program constituting the software is incorporated in dedicated hardware or a computer in which programs for executing various functions are installed. . For example, a program constituting desired software may be installed and executed on a general-purpose personal computer or the like.

  Further, a recording medium that records a program code of software that realizes the functions of the above-described embodiments may be supplied to the system or apparatus. It goes without saying that the function is also realized by reading and executing the program code stored in the recording medium by a computer (or a control device such as a CPU) of the system or apparatus.

  As a recording medium for supplying the program code in this case, for example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM, etc. are used. Can do.

  Further, the functions of the above-described embodiment are realized by executing the program code read by the computer. In addition, an OS or the like running on the computer performs part or all of the actual processing based on the instruction of the program code. The case where the function of the above-described embodiment is realized by the processing is also included.

  Further, the present invention is not limited to the above-described embodiments, and various other application examples and modifications can be taken without departing from the gist of the present invention described in the claims.

  DESCRIPTION OF SYMBOLS 1A, 1B ... Body temperature management system, 10A, 10B ... Body temperature measuring device, 11 ... Infrared light detection part, 11a ... Infrared sensor, 12 ... Display part, 14 ... 1st communication part, 15 ... Control part, 15a ... Peak value Determination unit, 20 ... management server, 22 ... display unit, 23 ... second communication unit, 24 ... control unit, 25 ... recording unit

Claims (14)

An infrared light detector that detects infrared light emitted from the skin on the carotid artery of the subject's neck and outputs a received light signal;
A body temperature measuring device comprising: a peak value determining unit that determines a peak value of the temperature obtained from the received light signal as the body temperature of the measurement subject. Furthermore, a display unit that displays the body temperature of the subject,
The body temperature measurement device according to claim 1, further comprising: an identification unit that attaches identification information uniquely given to the measurement subject to measurement data including the body temperature of the measurement subject. The peak value determination unit holds the highest value for a predetermined time when the highest value among the received light signals output from the infrared light detection unit is obtained, and holds it within the predetermined time. The body temperature measuring device according to claim 2, wherein when a value higher than the calculated value is obtained, the held value is replaced with the obtained value. The infrared light detection unit is configured by an infrared sensor in which a plurality of infrared light detection elements are arranged in a plane, or a single infrared light detection element that receives infrared light reflected by a mirror. Body temperature measuring device. The infrared light detection unit is an infrared camera that outputs a thermal image obtained by imaging the measurement subject with infrared light to the display unit,
The body temperature measurement device according to claim 4, wherein the display unit displays the thermal image in addition to the body temperature of the measurement subject. In addition, a visible light camera that outputs a visible image obtained by imaging the measurement subject with visible light to the display unit,
The body temperature measurement device according to claim 5, wherein the display unit superimposes the visible image on the thermal image or displays only the visible image. Furthermore, a distance measuring unit for measuring the distance to the subject is provided,
The body temperature measurement device according to any one of claims 1 to 6, wherein the peak value determination unit detects the infrared light when a distance to the measurement subject is within a predetermined value. Detecting infrared light emitted from the skin on the carotid artery of the subject's neck and outputting a light reception signal;
Determining a peak value of the temperature obtained from the received light signal as the body temperature of the person to be measured. Displaying the body temperature of the measurement subject on a display unit;
The body temperature measurement method according to claim 8, further comprising a step of attaching identification information uniquely given to the measurement subject to measurement data including a body temperature of the measurement subject. Among the light reception signals, when the highest value is obtained, the highest value is retained for a predetermined time, and when the value higher than the retained value is obtained within the predetermined time, the retained value is retained. The body temperature measuring method according to claim 9, further comprising a step of replacing the value with the calculated value. Outputting a thermal image obtained by imaging an image of the person to be measured by infrared light to the display unit;
The body temperature measurement method according to claim 10, wherein the display unit includes a step of displaying the thermal image in addition to the body temperature of the measurement subject. A visible light camera that outputs a visible image obtained by capturing the subject under visible light to the display unit;
The body temperature measurement method according to claim 11, wherein the display unit includes a step of superimposing the visible image on the thermal image or displaying only the visible image. And measuring the distance to the subject;
The body temperature measuring method according to claim 8, further comprising: detecting the infrared light when a distance to the subject is within a predetermined value. A body temperature management system comprising a body temperature measuring device for measuring a body temperature of a measurement subject, and a management server for managing the body temperature of the measurement subject collected from the body temperature measurement device,
The body temperature measuring device is
An infrared light detector that detects infrared light emitted from the skin on the carotid artery of the subject's neck and outputs a received light signal;
A peak value determination unit for determining a temperature peak value obtained from the received light signal as the body temperature of the person to be measured;
An identification unit that uniquely attaches identification information to the person to be measured to measurement data including the body temperature of the person to be measured;
A first communication unit that transmits the measurement data to the management server for each identified person to be measured,
The management server
A second communication unit that receives the measurement data from the body temperature measurement device;
A totaling unit that counts the body temperature of the measurement subject read from the measurement data for each measurement target and obtains a totaling result;
A body temperature management system comprising: a display unit configured to display the counting result.

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