JP5243301B2 - Biodynamic measurement device - Google Patents

Description

  The present invention relates to a biodynamic measurement device capable of managing / monitoring health of infants, the elderly, and bedridden patients. In particular, a body temperature trend for a predetermined time is stored in advance, and when monitoring, the measurement unit and the main body are separated. In addition, the present invention relates to a living body dynamics measuring apparatus that transmits body temperature, body movement / position information, and sweating information wirelessly at predetermined intervals. Further, the present invention relates to a living body dynamics measuring device in which a body temperature measurement value for a predetermined time is stored by a measurement unit as needed, and the stored body temperature value is read and displayed.

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 alarms are generated by trend changes by setting large threshold values of 40 ° C. and 34 ° C. for body temperature and comparing them with each other (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 (8) below.

  (1) A band having a one-touch type locking portion, an RFID including a semiconductor temperature sensor, a body motion detecting means, and a humidity sensor provided inside the band, and an antenna of a predetermined size or more mounted on the band A body kinetic measurement unit comprising: a body temperature measured by the semiconductor temperature sensor; a body motion information measured by the body motion detection means; and a sweating information measured by the humidity sensor; And a body part provided with a display part for displaying the body movement information and the sweating information. 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 biodynamic measurement 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 biodynamic measurement 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 biological movement measuring device according to any one of (1) to (3), wherein the body movement detecting means is an acceleration sensor. Thus, by using the acceleration sensor as the body motion detection means, it is possible to reduce the size and integrate with the IC tag.

  (5) The biodynamic measurement apparatus according to any one of (1) to (4), 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.

  (6) The biodynamic measurement apparatus according to any one of (1) to (5), 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.

  (7) The biodynamic measurement apparatus according to any one of (1) to (6), 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.

  (8) The biodynamic measurement apparatus according to any one of (1) to (7), 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 and easy to put on and take off, and body temperature, body movement / position information, and sweating information can be measured intermittently. Even caregivers can respond promptly.

FIG. 2 is a diagram showing a biodynamic measurement unit 100 according to an embodiment of the present invention and a biodynamic measurement unit 100 in a state of being attached to an infant P. 3 is a block diagram showing a functional configuration of a biological movement measuring unit 100 including an antenna 220 and an 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 biodynamic measuring apparatus. 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. FIG. 5 is a diagram for explaining the contents of body temperature data calculation processing in a signal processing unit 304. It is a figure which shows the biodynamic measurement part 100 which concerns on another embodiment of this invention. It is a figure which shows the biodynamic 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 living body dynamics measuring unit 100 mounted on an infant P. It should be noted that the dynamics in the biological dynamic measurement device refers to fluctuations in body temperature, body movement / position information, and sweating information. The biological movement measuring device 100 shown in FIG. 1 and the main body 300 shown in FIG. 3 constitute a biological movement measuring apparatus capable of health management / monitoring. 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 biological movement measuring unit 100 including the antenna unit 220 and an IC tag (RFID) 210 having a temperature sensor, a body motion detection unit (acceleration sensor), and a humidity 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 Biological Movement Measuring Device (Biokinetic Measuring Unit 100 and Main 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. For the infant P, the body movement measuring unit 100 including the band 200 that can be attached to the measurement site, the IC tag 210 having the temperature sensor, the body motion detection means 206, and the humidity sensor 207, and the antenna 220 is placed at an appropriate position on the body. A body temperature of the infant P is measured by wearing it on the thigh.

  The band 200 is a flexible band, and the flexible part 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 biodynamic 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 the 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. In addition, the living body measurement unit 100 is provided with an IC tag 210 having a temperature sensor (temperature sensing unit 204), body motion detection means 206 (acceleration sensor), and humidity sensor 207 inside the band 200, and the antenna 220 is also the same. Is provided. 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 inside the band 200 forms a convex portion. In this case, 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 embodiment, and can be appropriately changed depending on the measurement site such as the upper arm or the thigh.

  The main unit 300 includes a display unit 313 for displaying body temperature, body movement / position information, sweating information, a notification unit 316 such as a buzzer, a wireless IC tag reading unit 310, an input unit 315, a storage unit 312, a microcomputer, etc. Control unit (CPU) 311 and an external communication unit 314 that performs communication via an information communication network (not shown) such as the Internet using i-mode. 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, pertussis, 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 provided, a server (data processing device) is installed, and the ID of the infant P is associated with the pulse, breathing, blood pressure, body temperature, body movement, sweating, blood oxygen saturation level. In addition, collection, tabulation, data analysis, and the like of real-time measurement data of biological information such as blood glucose may be performed. 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 biodynamic measurement unit>
Next, a functional configuration of the biological movement measuring unit 100 will be described. FIG. 2 is a diagram illustrating a functional configuration of the biological movement measuring 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, a booster circuit, and the like. 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. Note that 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 entire biological movement measuring 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. At this time, body movement / position information and sweating information may also be stored in the EEPROM provided in the storage unit 203 in the same manner as the body temperature information. 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.

  Reference numeral 206 denotes body motion detection means, and it is preferable to use a MEMS type triaxial acceleration sensor as the body motion detection means 206 for measuring body motion / position information. There are three types of MEMS type triaxial acceleration sensors, ie, a piezoresistive type, a capacitance type, and a heat detection type, depending on the detection mechanism, but any detection mechanism may be used. In addition to the MEMS type triaxial acceleration sensor, the body motion detecting means 206 only needs to be able to obtain body motion / position information, so three tilt sensors and gyroscopes provided in three axial directions are used. Also good. By displaying the body movement / position information detected by the body movement detection unit 206 on the display unit 313 of the main body unit 300, not only the correlation with the body temperature information but also the body temperature information caused by rolling over or coughing. You can check body movements.

Reference numeral 207 denotes a humidity sensor. As the humidity sensor 207 for measuring sweating information, a MEMS type humidity sensor is preferably used, and examples thereof include a polymer film humidity sensor and a ceramic humidity sensor. Among polymer film humidity sensors, a capacitive polymer film humidity sensor that utilizes the property that the wet and dry materials of cellulosic hydrophilic polymers change the capacitance according to the adsorbed moisture is further used. Of the ceramic humidity sensors, MgCr ₂ O ₄ —TiO ₂ ceramics, TiO ₂ —V ₂ O ₅ ceramics, and the like are more preferable.

  By displaying the body movement / position information detected by the body movement detection unit 206 and the sweating information detected by the humidity sensor 207 on the display unit 313 of the main body 300, body temperature information, body movement / position information, and sweating information 3 In addition to species correlation, body movement due to turning over or coughing, sweating before the heat goes down (a sign of recovery), sweating due to poor physical condition, etc., which could not be confirmed only by body temperature information, can be confirmed.

  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 have 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 preferably can transmit 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 biological movement 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 biological movement measuring unit 100 including the IC tag (RFID) 210 having the temperature sensing unit 204 (temperature sensor), the body motion detection unit 206, and the humidity sensor 207 on the infant P is connected to the infant P with the IC. The tag 210 is attached to the band 200 so that the tag 210 comes into contact with the tag 210 and is attached to an appropriate position on the body such as the arm or 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. For body temperature information, a time condition set in advance by the input unit 315, for example, a biodynamic measurement unit 100 including an IC tag (RFID) 210 having a temperature sensing unit 204 is attached to the infant P and a measurement start instruction is input. For example, an 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, for example, after 5 minutes from the point in time when a 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. The body movement / position information and sweating information may also be stored in the storage unit 312 similarly to the body temperature information and displayed on the display unit 313 for a predetermined period, for example, 30 days. As a result, in the case of body movement / posture information, there was a sign of fever due to coughing or weakening, and in the case of sweating information, there was a sign of poor physical condition due to sweating or fever due to sweating (recovering). It can be confirmed because the body movement / posture information and sweating information appear that the body temperature information alone could not be confirmed.

  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. 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 the biodynamic measurement device>
Next, the flow of the body temperature measurement process in the living body dynamic measurement device will be described. FIG. 4 is a diagram illustrating a flow of a body temperature measurement process in the living body dynamic measurement device.

  As shown in FIG. 4, after the main body 300 is activated, when the main body 300 is brought close to the vicinity of the living body dynamic measurement unit 100, the antenna 301 and the antenna 220 are connected by an electromagnetic wave having a predetermined frequency, for example, 13.56 MHz. Power is supplied from the main body unit 300 to the biological movement measuring unit 100 by magnetic coupling.

  In the biological movement measuring unit 100 to which power is supplied, the IC tag 210 is activated, and it is determined whether or not the biological movement measuring unit 100 is in a state that affects the accuracy of body temperature measurement. When it is determined that the biodynamic measurement unit 100 is in a state that affects the accuracy of body temperature measurement, the IC tag 210 does not perform the subsequent processing. In this case, the main body unit 300 determines that there is no data transmission from the biological movement measuring unit 100 within a certain time after the 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 biological movement measuring unit 100 is not in a state that affects 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 biological movement 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. In addition, the above-mentioned “state in which the biological movement measuring unit 100 affects the accuracy of the body temperature measurement” is a state in which the heat of the IC tag 210 or the antenna 220 is highly likely to affect the accuracy of the body temperature measurement 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 biological movement 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 biological movement measuring 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 body temperature data by substituting the voltage data received from the biological movement measuring unit 100 into the calculated regression line 804.

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

<Biodynamic measurement unit 100 according to another embodiment of the present invention>
(Example 2)

  FIG. 9 is a diagram showing a biodynamic measurement unit 100 according to another embodiment of the present invention. A body movement 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 position of the body to measure body temperature.

  The band 200 is a flexible band, and the flexible part 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. Further, the buckle 250 is a one-touch type, and any shape and material may be used as long as it secures locking. 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 Biodynamic measurement unit 200 Band 202 Wireless inner face 203 Storage unit 204 Temperature sensing unit 205 Control unit 206 Body motion detection means 207 Humidity sensor 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 (6)

A biological movement measuring device comprising: a mounting body to be mounted on a subject; and a measurement unit that is disposed on the mounting body and measures the biological dynamics of the subject,
The wearing body is
A convex contact surface that comes into contact with the measurement site of the subject in a state worn on the subject,
The gripping surface has two gripping curved surfaces extending from the side surface of the contact surface so as to grip the outer peripheral surface of the entire mounting site including the measurement site of the subject, and the two gripping curved surfaces are elastically deformed in the radial direction. A winding portion that can be expanded in accordance with the diameter of the mounting portion,
Each of the two gripping curved surfaces of the winding portion is configured to have a large curvature along the longitudinal direction of the contact surface,
The measuring unit is
An antenna unit arranged in the winding unit and receiving electromagnetic waves transmitted from the outside;
An IC tag part that is disposed on the contact surface and includes a temperature sensing part that is controlled by a control part that is activated by an induced electromotive force generated when the antenna part receives electromagnetic waves , and
The temperature sensing part is further
A detection unit in which two or more semiconductor temperature sensors for detecting a band gap voltage when two types of semiconductors of P-type and N-type are combined and a current is passed through the combination of the two types of semiconductors are connected in parallel When,
A storage unit for storing calibration data for calibrating the band gap voltage detected by the detection unit,
A biodynamic measurement apparatus configured to transmit the band gap voltage detected by the detection unit together with the calibration data via the antenna unit when the control unit is activated .   The biodynamic measurement apparatus according to claim 1, wherein the antenna unit is arranged in a region having a large curvature on the grip curved surface.   The biodynamic measuring device according to claim 1, wherein a male surface fastener and a female surface fastener are attached to the two gripping curved surfaces, respectively. The IC tag portion further comprises a humidity sensor for measuring the humidity of said subject's body surface, said to claim 1, characterized in that it comprises a body motion detector for detecting body motion of the subject 4. The biodynamic measurement apparatus according to any one of 3 above. The said detection part is equipped with the said semiconductor temperature sensor 6-10 pieces, The average value of the band gap voltage in the coupling | bond part of each said semiconductor temperature sensor is detected , The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The biodynamic measurement apparatus as described. Wherein, when there is a temperature rise with the generation of the induced electromotive force in the antenna unit, any one of claims 1 to 5, characterized in that stops controlling according to the running of the control unit 1 The biological dynamics measuring device according to item.

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