JP2010197255A - Device for measuring body temperature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional monitoring system that a communication range is not made long (wide), because the size of an antenna is limited, since an antenna part for performing transmission to and reception from the outside is also contained in an IC tag (RFID), and therefore the range enabling communication with the outside is also limited. <P>SOLUTION: The antenna is not mounted in the IC tag, but mounted in a one-touch type band. Thereby the antenna is made large in size and, as the result, transmission and reception are performed with little power consumption. Besides, the communication range is made longer (wider) than that of the system wherein the antenna is mounted in the IC tag. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a body temperature measuring device that can manage and monitor the health of infants, the elderly, and bedridden patients. In particular, a body temperature trend for a predetermined time is stored in advance, and the measuring unit and the main body are separated when monitoring. The present invention relates to a body temperature measurement device that transmits body temperature data wirelessly at predetermined intervals. In addition, the present invention relates to a body temperature measuring device that stores a measured body temperature value for a predetermined time by a measuring unit, and reads and displays the stored body temperature value as necessary.

  There has been proposed a monitoring system that measures biological information and behavior information, estimates an infant's condition, and can take an appropriate response to the incident of the infant (Japanese Patent Laid-Open No. 2004-181218). . However, it is not a matter of judging how a sudden change in body temperature due to an infection or the like differs from normal. As a system for improving this, there has been proposed a system for determining the urgency level of a biological signal and generating an alarm (Patent Document 2: Japanese Patent No. 3661686). In addition, a system has been proposed in which an alarm is generated by a trend change by setting large threshold values of 40 ° C. and 34 ° C. and comparing them with body temperature (Patent Document 3: Japanese Patent Application Laid-Open No. 2007-229076).

JP 2004-181218 A Japanese Patent No. 3661686 JP 2007-229076 A

  In the conventional monitoring system, since the antenna part that performs transmission and reception with the outside is also included in the IC tag (RFID), the size of the antenna is limited, and therefore the range in which communication with the outside is possible is limited. Therefore, there is a problem that the communication distance cannot be long (wide).

In order to solve the above-described problems, the present invention can provide a large antenna by mounting it in a one-touch band without mounting the antenna in an IC tag, and as a result, can transmit and receive with low power consumption. In addition, the present inventors have found that the communication distance can be increased (wider) as compared with the case where the antenna is mounted on the IC tag. Furthermore, according to the present invention, since the antenna has a large antenna and low power consumption, the effect of reducing the heat generation of the antenna and the IC tag can be found compared to the conventional case.

  The above-mentioned problems are solved by the present inventions (1) to (7) below.

  (1) A band having a one-touch type locking part, an RFID including a semiconductor temperature sensor provided inside the band, a body temperature measuring part comprising an antenna of a predetermined size or more mounted on the band, A body temperature measuring apparatus comprising: a reading unit that wirelessly reads a body temperature measured by a semiconductor temperature sensor; and a main body unit including a display unit that displays the body temperature. As described above, by mounting the antenna in the band without mounting it in the IC tag (RFID), the antenna can be made large, and as a result, transmission / reception can be performed with low power consumption, and the antenna is mounted on the IC tag. The communication distance can be made longer (wider) than that installed. Furthermore, because of the large antenna and small power consumption, the heat generation of the antenna and the IC tag can be reduced as compared with the conventional case.

  (2) The body temperature measuring device according to (1), wherein the one-touch type locking portion is a male surface fastener and a female surface fastener. As described above, since the one-touch type locking portion is the male surface fastener and the female surface fastener, not only the mounting can be facilitated but also the mounting can be ensured.

  (3) The body temperature measuring device according to (1), wherein the one-touch type locking portion is a buckle. As described above, since the one-touch type locking portion is a buckle, not only the mounting can be facilitated, but also the mounting can be ensured.

  (4) The body temperature measuring device according to any one of (1) to (3), wherein the band is a flexible band. As described above, since the band is a flexible band, not only can the mounting be facilitated, but also the adhesion of the band to the measurement site can be improved.

  (5) The body temperature measuring device according to any one of (1) to (4), wherein the band is removable from at least one of the RFID and the antenna. As described above, the RFID (IC tag) and the antenna can be removed from the band, so that the band can be exchanged and the RFID (IC tag) and the antenna can be changed.

  (6) The body temperature measuring device according to any one of (1) to (5), wherein the band has a fan shape. As described above, since the band is fan-shaped, not only can the mounting be facilitated, but also the adhesion of the band to the measurement site can be improved.

  (7) The body temperature measuring device according to any one of (1) to (6), wherein the RFID includes a band gap voltage circuit. As described above, since the RFID includes the band gap voltage circuit, the body temperature can be measured with higher accuracy than the conventional temperature sensor (eg, thermistor).

According to the present invention, since the antenna can be made large in the band, the power consumption is small, the communication distance is relatively long, the power consumption is small, and the antenna is large. In addition, the structure is simple, easy to put on and take off, body temperature can be measured intermittently, and caregivers can quickly respond to sudden body temperature changes in infants, the elderly, and bedridden patients. .

It is a figure which shows the body temperature measurement part 100 which concerns on one Embodiment of this invention, and the body temperature measurement part 100 of the state with which the infant P was mounted | worn. It is a block diagram which shows the function structure of the body temperature measurement part 100 provided with the antenna 220 and the IC tag 210. FIG. 3 is a block diagram showing a functional configuration of a main body unit 300. FIG. It is a figure which shows the flow of the body temperature measurement process in a body temperature measuring device. It is a figure which shows the characteristic of a semiconductor temperature sensor. 3 is a diagram illustrating a circuit configuration of a sensor unit 211. FIG. 3 is a diagram illustrating a circuit configuration of a circuit unit 212. FIG. It is a figure for demonstrating the content of the body temperature data calculation process in the signal processing part. It is a figure which shows the body temperature measurement part 100 which concerns on another embodiment of this invention. It is a figure which shows the body temperature measurement part 100 which concerns on another embodiment of this invention.

(Example 1)

  FIG. 1 shows an embodiment of the present invention, and shows a body temperature measuring unit 100 mounted on an infant P. A body temperature measuring device capable of health management / monitoring is configured by the body temperature measuring unit 100 shown in FIG. 1 and the main body unit 300 shown in FIG. An infant health management / monitoring apparatus can be applied to a hospital or the like using a similar portable terminal or stationary terminal. FIG. 2 is a block diagram of the body temperature measurement unit 100 including an IC tag (RFID) 210 having an antenna unit 220 and a temperature sensor. The invention of the present application is not limited to the infant health management / monitoring device of the embodiment, but can be appropriately modified such as a health management / monitoring device for elderly people and bedridden patients. Also, as shown in FIG. 3, the external communication unit 314 provided in the main body unit 300 is interactively connected to a site such as a hospital or an attending physician via an information communication network (not shown) such as a dedicated LAN, a telephone line, or the Internet. Information communication may be possible.

<Specific Configuration of Body Temperature Measuring Device (Body Temperature Measuring Unit 100 and Body 300)>
The infant P who is the subject is in a state of lying down, lying on his back, etc. with a diaper (pants) Q on the bed. A body temperature measuring unit 100 including a band 200 that can be attached to a measurement site, an IC tag 210 having a temperature sensor, and an antenna 220 is attached to an appropriate place on the body, in this case, the thigh. Measure.

  The band 200 is a flexible band, and the flexible portion is in contact with the skin. Therefore, the band 200 can be a material for clothing such as fibers such as silk, cotton, hemp, nylon, and polyester, artificial leather, and nonwoven fabric. A material is preferable. Further, the band 200 has a male surface fastener 230 on one side and a female surface fastener 240 on the other surface. By bonding the male surface fastener 230 and the female surface fastener 240, the band 200 200 is wound around the measurement site. That is, the male surface fastener 230 and the female surface fastener 240 function as a one-touch type locking portion. Further, when the body temperature measuring unit 100 is expanded, the band 200 has a fan shape, so that the wearability when the band is wound around a tapered portion such as the upper arm or thigh is improved. In addition, the male surface fastener 230 may be provided with a knob or a slit (not shown) to facilitate attachment or detachment, or by widening the fastener surface of the female surface fastener 240, the adjustment width for winding the band. You may make it take large. The body temperature measuring unit 100 is provided with an IC tag 210 having a temperature sensor (temperature sensing unit 204) inside the band 200, and an antenna 220 is also provided in the same manner. However, the antenna 220 may be incorporated inside the band or provided outside the band. Further, in order to make contact with the measurement site of the IC tag 210 more reliable, the contact surface with the measurement site on the inner side of the band 200 forms a convex portion. At this time, the contact surface is preferably a rigid body, and for example, plastic materials such as polyethylene, polypropylene, and cyclic polyolefin, and metals such as ceramics and stainless steel are preferable. As described above, the material, shape, and the like of the band 200 are not limited to the examples, and can be appropriately changed depending on the measurement site such as the upper arm or the thigh.

  The main body 300 includes a display unit 313 for displaying a body temperature, a notification unit 316 such as a buzzer, a wireless IC tag reading unit 310, an input unit 315, a storage unit 312, a control unit (CPU) 311 such as a microcomputer, i An external communication unit 314 that performs communication via an information communication network (not shown) such as the Internet in the mode is provided. The control unit 311 is executed by the control unit 311 and includes a ROM that stores a control program and various data for the entire main body, and a RAM that temporarily stores various data as a work area.

  In addition, information on vaccinations (flu, mumps, polio, whooping cough, rubella, measles, tuberculosis, etc.) and past medication data (information such as drug name, dose, and administration date: medication that avoids allergic reactions) Necessary to do this) can also be input via the input unit 315 and stored and displayed. In addition, input items can be appropriately selected by the input unit 315, and body temperature, body weight (necessary for determining the dose), blood pressure, pulse, blood glucose level, and the like can be input, stored, and displayed. By doing so, it is also possible to fulfill the function as a maternal and child health handbook. As the IC tag 210 having a temperature sensor used in a hospital or the like, it is preferable to use an anti-coregion type IC tag capable of simultaneously reading body temperature information. The specific functional configuration of the main body unit 300 will be described later.

  In hospitals, etc., a management site / medical site is set up, a server (data processing device) is installed, and associated with the ID of the infant P, a living body such as pulse, respiration, blood pressure, body temperature, blood oxygen saturation, blood sugar, etc. You may make it perform collection, totalization, data analysis, etc. of real-time measurement data of information. By doing so, abnormalities can be quickly grasped even for a sudden rise in body temperature due to infection, etc., lying down, suffocation due to suffocation due to vomiting, etc. In addition, a management computer etc. is also installed on the desk of the attending doctor, and the attending doctor grasps and monitors the physical condition of the subject (for example, infant P) at any time, and receives an abnormal report on the subject in an emergency, It may be possible to give instructions to the nurse's waiting room by telephone or to make a contact with a handy nurse call. In addition, it is convenient that a clock unit (not shown) is provided with a radio clock function that can correct the time by receiving radio waves.

<Functional configuration of body temperature measurement unit>
Next, the functional configuration of the body temperature measurement unit 100 will be described. FIG. 2 is a diagram illustrating a functional configuration of the body temperature measurement unit 100 including the antenna 220 and the IC tag (RFID) 210.

  In FIG. 2, reference numeral 202 denotes a wireless interface, which includes a rectifier circuit and a booster circuit. In the wireless interface 202, the AC voltage generated in the antenna 220 is converted into a predetermined DC voltage and supplied to the storage unit 203 and a control unit (CPU) 205 such as a microcomputer. The control unit 205 includes a ROM that is executed by the control unit 205 and stores a control program and various data of the whole body temperature measurement unit, and a RAM that temporarily stores various data as a work area. In addition, the voltage data acquired in the control unit 205 is transmitted to the main body unit 300 via the antenna 220 as data of a predetermined format together with various information.

  A storage unit 203 stores calibration data of a temperature sensing unit 204 described later, identification information unique to the IC tag 210, and the like. Therefore, since the body temperature information can also be stored in the EEPROM provided in the storage unit 203, the body temperature information can be continuously stored even if the infant P is transferred to another bed or another room. Further, it is possible to provide an anti-co-region type so as not to acquire information on the wrong infant P ′ (not shown), and to provide a security function by enabling the signal output from the antenna 220 to be encrypted.

  A temperature sensing unit 204 includes a sensor unit 211 that includes a temperature sensor and a circuit unit 212 that processes the output of the sensor unit 211. A semiconductor temperature sensor is used as the temperature sensor. Analog output is provided almost linearly with respect to temperature changes, and it can be miniaturized and integrated with IC tags. The temperature resolution between 35 and 42 ° C is 0.01 ° C. is there. For example, a C-MOS temperature sensor is preferably used. Details of the circuit configurations of the sensor unit 211 and the circuit unit 212 will be described later.

  The IC tag 210 has a width W of 5 mm × 5 mm and a thickness T of about 1.5 mm. The IC tag 210 may be of any frequency as long as it can communicate (transmit / receive) with an electromagnetic wave having a frequency that can pass through a living body, but is preferably capable of transmitting with an electromagnetic wave of 13.56 MHz. .

  In addition, since the antenna 220 is mounted on the band 200 and can be made larger than the antenna incorporated in the IC tag, the antenna may have any shape, but may have a shape such as a circle, a square, or a rectangle. It is preferable that More preferably, in the case of a circular shape, the diameter D is 20 mm to 40 mm and the thickness T is about 1 mm. In the case of a rectangular shape, the length in the major axis direction is L1, and the length in the minor axis direction is L2. , L1 is 20 mm, L2 is 40 mm, and thickness T is about 1 mm. Note that the IC tag 210 and the antenna 220 are removed from the band 200 so that the band can be exchanged or when the dirt of the band is removed by moisture, or the IC tag or antenna can be replaced with another band. It may be possible.

<Functional configuration of main unit>
Next, the functional configuration of the main body unit 300 will be described. FIG. 3 is a diagram illustrating a functional configuration of the main body unit 300.

  In FIG. 3, reference numeral 310 denotes an IC tag reading unit, which includes an antenna 301, a wireless interface 302, a signal conversion unit 303, and a signal processing unit 304.

  The antenna 301 magnetically couples with the antenna 220 of the body temperature measuring unit 100 to supply power to the IC tag 210 and receive data from the IC tag 210.

  The wireless interface 302 controls the voltage applied to the antenna 301 in order to supply power to the IC tag 210 via the antenna 301, and the data received from the IC tag 210 via the antenna 301 is sent to the signal conversion unit 303. Or send.

  The signal conversion unit 303 converts the data transmitted from the wireless interface 302 into digital data and transmits the digital data to the signal processing unit 304.

  The signal processing unit 304 processes the digital data received from the signal conversion unit 303 and calculates body temperature. Specifically, body temperature data is calculated based on voltage data and calibration data included in the received digital data. The calculated body temperature data is transmitted to the control unit 311 together with the identification information included in the received digital data.

  The control unit 311 controls operations of the wireless interface 302, the signal conversion unit 303, and the signal processing unit 304. The body temperature data transmitted from the signal processing unit 304 is stored in the storage unit 312 together with the identification information or displayed on the display unit 313. Further, the body temperature data stored in the storage unit 312 is transmitted to the other information processing apparatus (another information processing apparatus wired by way of the external communication unit 314) via the external communication unit 314 together with the identification information. Or In addition, an input unit 315 for inputting setting instructions and selecting conditions in body temperature measurement, and a notification unit 316 for notifying abnormality of body temperature information, measurement end, etc. by a buzzer, a vibrator, light, etc. ing.

<Normal health management / monitoring function based on body temperature information>
Next, a normal health management / monitoring function based on body temperature information will be described. The present invention is not limited to the embodiment described here, and can be modified as appropriate.

  As described above, the body temperature measuring unit 100 including the IC tag (RFID) 210 having the temperature sensing unit 204 on the infant P is provided on the band 200 so that the IC tag 210 comes into contact with the infant P. Wear it at the right place on the body such as the thigh. The measurement is started by starting the count of the measurement start time or by inputting a measurement start time setting (time setting) instruction using the input unit 315 or the like. The body temperature information is a time condition set in advance by the input unit 315, for example, when the body temperature measuring unit 100 including the IC tag (RFID) 210 having the temperature sensing unit 204 is attached to the infant P and a measurement start instruction is input. The electromagnetic wave having a predetermined frequency, for example, 13.56 MHz is transmitted from the IC tag reading unit 310 to the IC tag (RFID) 210 after 5 minutes, for example, based on the time point when the predetermined temperature rise is confirmed (in this case, The transmission / reception distance is about 1 cm to 10 cm), and body temperature information of the temperature sensor obtained in synchronization with the signal is read. Next, the measured body temperature information is stored in the storage unit 312. This body temperature information is compared with a threshold value. For example, in the case of body temperature, the upper limit value is 37.5 ° C., and the lower limit value is 35.5 ° C. The upper limit value / lower limit value can be arbitrarily set and input by the user (mother, guardian, etc.) based on or referred to the body temperature trend information for the predetermined period described above and can be changed. When it is determined that the body temperature information is abnormal (including abnormalities during measurement), an alarm is generated by the notification means 316. Further, when the measurement is completed, a notification means 316 such as a buzzer, a vibrator, or light notifies the user. When there is an abnormality (for example, basal body temperature at the time of fever), “fever” is displayed on the display unit 313, a note to that effect is input at the input unit 315, and stored in the storage unit 312. If abnormal, reset as necessary, return to the measurement start step, and measure the body temperature again. If there is no abnormality, the measured body temperature is stored and displayed on the display unit 313, and then the operation is terminated. The body temperature is preferably displayed on the display unit 313 together with the measurement date. In addition, during fever, simultaneously with the display of the body temperature trend, the pulse during measurement, blood oxygen saturation (SPO2), etc. measured with a pulse oximeter connected to the main body 300 and the connection terminal (external communication unit 314) When data is input and displayed in an overlapping manner, respiratory diseases caused by infections such as influenza and RS (Respiratory Syncytial) virus can be easily grasped.

  Information such as body temperature, memo input, weight, height, and the like stored in the storage unit 312 is displayed on the display unit 313 for a predetermined period, for example, 30 days. In particular, the weight and height information can be displayed in comparison with the standard value, the lower limit value, and the upper limit value. For this reason, the degree of growth can be glimpsed, and it also functions as a maternal and child health handbook. Such information, along with the ID of the infant P, is encrypted and transmitted to the server of a health-related service provider's server or medical site such as the attending physician via the Internet, a dedicated LAN, etc., and if necessary, advice such as comments from the attending physician You can make it receive. Alternatively, the information may be downloaded from the external communication unit 314 to the USB stick, and the USB stick may be brought to the attending physician.

<Flow of body temperature measurement process in body temperature measuring device>
Next, the flow of the body temperature measurement process in the body temperature measuring device will be described. FIG. 4 is a diagram showing a flow of a body temperature measurement process in the body temperature measuring device.

  As shown in FIG. 4, when the main body unit 300 is brought close to the vicinity of the body temperature measuring unit 100 after the main body unit 300 is activated, the magnetism between the antenna 301 and the antenna 220 is generated by an electromagnetic wave having a predetermined frequency, for example, 13.56 MHz. Power is supplied from the main body 300 to the body temperature measuring unit 100 by the coupling.

  In the body temperature measurement unit 100 supplied with power, the IC tag 210 is activated, and it is determined whether or not the body temperature measurement unit 100 is in a state of affecting the accuracy of body temperature measurement. When it is determined that the body temperature measurement unit 100 is in a state that affects the accuracy of body temperature measurement, the IC tag 210 does not perform subsequent processing. In this case, the main body unit 300 determines that there is no data transmission from the body temperature measurement unit 100 within a certain time after power is supplied, and displays an error on the display unit 313 as a display process. At this time, not only an error display but also a notification means 316 such as an alarm may be used.

  On the other hand, when it is determined that the body temperature measurement unit 100 is not in a state of affecting the accuracy of body temperature measurement, the IC tag 210 starts processing.

  Specifically, after switching to a preset determination range (details will be described later), a current is passed through the semiconductor temperature sensor in the sensor unit 211 to detect the band gap voltage.

  Further, the circuit unit 212 processes the detected band gap voltage, and the control unit 205 acquires voltage data.

  The acquired voltage data is transmitted to the main unit 300 together with the calibration data and identification information stored in the storage unit 203.

  The main body unit 300 calculates body temperature data based on the voltage data and calibration data transmitted from the body temperature measuring unit 100 as display processing. Further, the calculated body temperature data is stored in the storage unit 312 in association with the identification information and displayed on the display unit 313. Note that the above-described “state in which the body temperature measurement unit 100 affects the accuracy of body temperature measurement” refers to a state in which there is a high possibility that the accuracy of body temperature measurement will be affected by heat generated by the IC tag 210 and the antenna 220 in this case. pointing.

<Description of semiconductor temperature sensor>
Next, a general semiconductor temperature sensor applied to the sensor unit 211 will be described. FIG. 5 is a diagram illustrating characteristics of the semiconductor temperature sensor. In the present embodiment, the semiconductor temperature sensor adapted to the sensor unit 211 is configured by combining a P-type semiconductor and an N-type semiconductor, and in the case where a direct current is passed, the semiconductor temperature sensor is correlated to the temperature and is connected to the coupling unit (junction). The generated voltage (band gap voltage Vb) is detected ((a) of FIG. 5).

  In the case of a semiconductor temperature sensor, as shown in FIG. 5B, the band gap voltage Vb and temperature have linearity in a wide range of approximately −40 ° C. to + 150 ° C. In addition, the semiconductor temperature sensor has an advantage that it is more resistant to changes with time and less susceptible to noise than the thermistor.

<Circuit configuration of sensor unit>
Next, the circuit configuration of the sensor unit 211 will be described. FIG. 6 is a diagram illustrating a circuit configuration of the sensor unit 211 configured using the semiconductor temperature sensor illustrated in FIG.

  In FIG. 6, reference numeral 601 denotes a constant current circuit, which adjusts the current flowing through each semiconductor temperature sensor to be uniform based on the current Vcc supplied from the control unit 205.

  A semiconductor temperature sensor 602 is connected in series to the constant current circuit 601 on the downstream side of the constant current circuit 601. Note that a plurality of semiconductor temperature sensors 602 are connected to the constant current circuit 601, and the semiconductor temperature sensors are connected in parallel to each other.

  The reason why the plurality of semiconductor temperature sensors are connected in parallel is to eliminate the influence of individual differences among the semiconductor temperature sensors. In order to realize more accurate body temperature measurement, the influence of individual differences of semiconductor temperature sensors cannot be ignored. In the sensor unit 211, a plurality of semiconductor temperature sensors are connected in parallel to obtain an average value. , Trying to eliminate the effects of individual differences.

  Therefore, the sensor unit 211 outputs an average value Vb_avg of the voltages Vb1, Vb2,... Vbn output from each semiconductor temperature sensor.

  It should be noted that the current flowing through each semiconductor temperature sensor is not limited to once, and may be configured to flow multiple times. In this case, the average value Vb_avg is output from the sensor unit 211 a plurality of times.

<Circuit configuration of the circuit section>
Next, the circuit configuration of the circuit unit 212 will be described. FIG. 7 is a diagram illustrating a circuit configuration of the circuit unit 212.

  As shown in FIG. 7, the circuit unit 212 includes a system connected to the A / D converter 701 via the comparison / amplifier 711 and the analog switch 712, and an A / D via the comparison / amplifier 721 and the analog switch 722. It consists of two systems connected to the D converter 701.

  The former system (first system) inputs the voltage Vb_avg output from the sensor unit 211 to the A / D converter 701 in the measurement range of −40 ° C. to + 150 ° C. On the other hand, the latter system (second system) outputs the voltage Vb_avg output from the sensor unit 211 to the A / D converter 701 in a measurement range of 20 ° C. to 50 ° C.

  Whether to output using the first system or the second system (that is, the measurement range) is controlled by switching the analog switches 712 and 722 based on the signal from the control circuit 702. The When more accurate body temperature measurement is performed, the second system is selected.

  The voltage Vb_avg input to the A / D converter 701 is A / D converted by the A / D converter 701 and input to the control circuit 702 as digital data.

  The digital data input to the control circuit 702 is transmitted to the wireless interface 202.

  When the voltage Vb_avg is output from the sensor unit 211 a plurality of times, each digital data is temporarily stored in the memory 703, and all the digital data stored in the memory 703 is stored in the control circuit 702. After calculating the average value, it may be transmitted to the wireless interface 202.

<Body temperature data calculation process in the main body>
Next, processing for calculating body temperature data in the signal processing unit 304 of the main body unit 300 will be described. FIG. 8 is a diagram for explaining the contents of processing for calculating body temperature data in the signal processing unit 304.

  In the signal processing unit 304, after correcting the graph (function) indicating the correspondence between the voltage data and the body temperature data in the reference semiconductor temperature sensor based on the calibration data, the received voltage data is substituted. Derived body temperature data.

  FIG. 8A is a diagram illustrating a correction process when one type of calibration data corresponding to one type of temperature is received. As shown in FIG. 8 (a), when one type of calibration data corresponding to one type of temperature is received, the offset value of the correspondence function between the voltage data and the body temperature data in the semiconductor temperature sensor serving as a reference is obtained. adjust. Specifically, the graph 801 is translated in the direction of the arrow as a whole to obtain a graph 802.

  The signal processing unit 304 derives body temperature data by substituting the voltage data received from the body temperature measuring unit 100 into the graph 802 after the parallel movement.

  FIG. 8B is a diagram showing correction processing when two types of calibration data corresponding to two types of temperatures are received. As shown in FIG. 8B, when two types of calibration data corresponding to two types of temperatures are received, a straight line 803 passing through the two points is calculated, and the voltage data and body temperature in the semiconductor temperature sensor are calculated. The graph shows the correspondence with data.

  The signal processing unit 304 derives body temperature data by substituting the voltage data received from the body temperature measurement unit 100 into the calculated straight line 803.

  FIG. 8C is a diagram showing a correction process when three or more types of calibration data corresponding to three or more types of temperatures are received. As shown in FIG. 8C, when three or more kinds of calibration data corresponding to three or more kinds of temperatures are received, a regression line 804 is calculated by the least square method based on the three or more points. This is a graph showing the correspondence between voltage data and body temperature data in the semiconductor temperature sensor.

  The signal processing unit 304 calculates the body temperature data by substituting the voltage data received from the body temperature measuring unit 100 into the calculated regression line 804.

  As is clear from the above description, the body temperature measurement unit 100 according to the present embodiment is configured to adapt a semiconductor temperature sensor as the band-type body temperature measurement unit 100 including an antenna.

In application of semiconductor temperature sensor,
In order to eliminate the influence of individual differences of the semiconductor temperature sensors, a plurality of semiconductor temperature sensors are connected in parallel in the sensor unit.
-In order to eliminate measurement errors, a current was passed through the sensor section a plurality of times and an average value was output during one body temperature measurement.
In order to eliminate the influence of individual differences of IC tags, calibration data is stored for each IC tag in the storage unit in the IC tag, and when the voltage data is transmitted by the main body unit, the calibration data is also transmitted. The configuration.

  As a result, highly accurate body temperature measurement can be realized.

<Body temperature measuring unit 100 according to another embodiment of the present invention>
(Example 2)

  FIG. 9 is a diagram showing a body temperature measurement unit 100 according to another embodiment of the present invention. A body temperature measurement unit 100 including a band 200 that can be attached to a measurement site, an IC tag 210 having a temperature sensor, and an antenna 220 is attached to an appropriate place on the body to perform body temperature measurement.

  The band 200 is a flexible band, and the flexible portion is in contact with the skin. Therefore, the band 200 can be a material for clothing such as fibers such as silk, cotton, hemp, nylon, and polyester, artificial leather, and nonwoven fabric. A material is preferable. Further, the band 200 has a buckle 250, and the length of the band 200 can be adjusted by the buckle 250 in the same manner as the belt adjustment of a waist pouch or a seat belt. As shown in FIG. 10, the band 200 is wound around the measurement site by locking the buckle 250. That is, the buckle 250 functions as a one-touch type locking portion. In addition, the buckle 250 is a one-touch type, and any shape and material may be used as long as it can be securely locked. However, the buckle 250 is preferably a rigid body, for example, a plastic such as polyethylene, polypropylene, or cyclic polyolefin. Materials, metals such as ceramics and stainless steel are preferred.

  In the embodiment as described above, the antenna can be made large, and as a result, transmission / reception can be performed with low power consumption, and the communication distance is longer (wider) than that in which the antenna is mounted on the IC tag. It is possible to take.

100 Body temperature measuring unit 200 Band 202 Wireless inner face 203 Storage unit 204 Temperature sensing unit 205 Control unit 210 IC tag (RFID)
211 sensor unit 212 circuit unit 220 antenna 230 male surface fastener 240 female surface fastener 250 buckle 300 main body unit 301 antenna 302 wireless interface 303 signal conversion unit 304 signal processing unit 310 IC tag reading unit 311 control unit 312 storage unit 313 display unit 314 External communication unit 315 Input unit 316 Notification unit 601 Constant current circuit 602 Semiconductor temperature sensor 701 A / D converter 702 Control circuit 703 Memory 711, 721 Comparison / amplifier 712, 722 Analog switch P Infant Q Diaper

Claims (7)

A band having a one-touch type locking portion; an RFID including a semiconductor temperature sensor provided inside the band; and a body temperature measuring portion including an antenna of a predetermined size or more mounted on the band;
A body temperature measuring device comprising: a reading unit that wirelessly reads a body temperature measured by the semiconductor temperature sensor; and a main body unit including a display unit that displays the body temperature.   The body temperature measuring device according to claim 1, wherein the one-touch type locking portion is a male surface fastener and a female surface fastener.   The body temperature measuring device according to claim 1, wherein the one-touch type locking portion is a buckle.   The body temperature measuring device according to any one of claims 1 to 3, wherein the band is a flexible band.   The body temperature measuring device according to any one of claims 1 to 4, wherein the band is removable from at least one of the RFID and the antenna.   The body temperature measuring device according to claim 1, wherein the band has a fan shape.   The body temperature measuring device according to any one of claims 1 to 6, wherein the RFID includes a band gap voltage circuit.

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