JP2012168155A - Wireless thermometer and wireless body temperature measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a wireless thermometer for accurately measuring a deep body temperature.SOLUTION: The wireless thermometer 10 includes a heat insulating body 130 having flexibility, insulating property, a prescribed heat resistance factor ρ, and a prescribed thickness D. A quartz vibrator 111 is arranged on one surface of the heat insulating body 130. A wound type coil electrode 121 is formed on the one surface of the heat insulating body 130 so as to encircle the quartz vibrator 111 in a plan view and is connected to the quartz vibrator 111. A quartz vibrator 112 is arranged on the other surface of the heat insulating body 130. A wound type coil electrode 122 is formed on the other surface of the heat insulating body 130 so as to encircle the quartz vibrator 112 in a plan view and is connected to the quartz vibrator 112.

Description

  The present invention relates to a wireless thermometer that measures a physical quantity determined by the body temperature of a test body and wirelessly transmits the physical quantity to an external device, and a wireless body temperature measurement system including the wireless thermometer.

  Conventionally, various devices for measuring deep body temperature have been devised, and one of them is the device shown in Patent Document 1. The apparatus shown in Patent Document 1 includes a thermometer main body mounted on the surface of a test body and a display device. Between the thermometer main body and the display device, wireless communication is possible.

  The thermometer body of Patent Literature 1 includes a body surface side temperature sensor and an outside air side temperature sensor as one set. The body surface side temperature sensor and the outside air side temperature sensor are arranged so as to interpose a heat insulating material having a predetermined thermal resistance. And the thermometer main body is installed with respect to a to-be-tested body so that a body surface side temperature sensor may contact | abut the surface of a to-be-tested body. The temperature detection result of the body surface side temperature sensor and the temperature detection result of the outside air side temperature sensor are transmitted to the display device by wireless communication.

  The display device of Patent Literature 1 is based on the temperature detection result of the body surface temperature sensor, the temperature detection result of the outside air temperature sensor, and the thermal resistance of the heat insulating material between the body surface temperature sensor and the outside air temperature sensor. The deep body temperature is calculated and displayed.

JP 2006-308538 A

  However, the body temperature measuring device shown in Patent Document 1 uses a structure in which the body surface side temperature sensor and the outside air side temperature sensor are physically connected to a single antenna by a conductive electrode pattern. For this reason, the body surface side temperature sensor and the outside air side temperature sensor are connected by the conductive electrode pattern.

  Therefore, when heat is conducted from the body surface to the outside air through the body surface side temperature sensor and the outside air temperature sensor, heat conduction is performed not only through the heat insulating material but also through the conductive electrode pattern. Thereby, the precision of the calculation result of deep body temperature will fall.

  An object of the present invention is to realize a wireless thermometer and a wireless body temperature measuring system capable of measuring a deep body temperature with high accuracy.

  The present invention relates to a wireless thermometer for measuring a deep body temperature of a test temperature body. The wireless thermometer of the present invention includes a heat insulator, first temperature detection means, second temperature detection means, a first antenna, and a second antenna. The heat insulator is formed of a material having a predetermined thermal resistivity. The first temperature detection means is disposed on one surface of the heat insulator, and the second temperature detection means is disposed on the other surface facing the one surface through the heat insulator. The first antenna transmits a first detection signal output from the first temperature detection means. The second antenna transmits a second detection signal output from the second temperature detection means. On such a structure, the 1st antenna and the 2nd antenna are each formed independently independently.

  In this configuration, a common antenna is not used for the first temperature detection unit and the second temperature detection unit. Therefore, the first temperature detection unit and the second temperature detection unit are not connected by the conductor. As a result, if the wireless thermometer is installed so that the second temperature detection means is in close contact with the surface of the test temperature body and the first temperature detection means is on the outside air side, the body temperature from the test temperature body is externally exposed. In the process of radiating heat, heat is conducted between the second temperature detection means and the first temperature detection means only through the heat insulator.

  In the wireless thermometer according to the present invention, a plurality of first temperature detecting means and a plurality of second temperature detecting means are provided.

  In this configuration, temperature detection results in two different heat transfer paths can be obtained, and the plurality of deep body temperatures can be calculated. Therefore, the deep body temperature with higher reliability can be measured.

  Further, in the wireless thermometer of the present invention, the first antenna and the second antenna are arranged in a region of one surface of the heat insulator or the other surface facing the one surface.

  In this configuration, the first antenna and the second antenna do not exist in a region protruding from the heat insulator. Therefore, it is possible to suppress direct heat radiation to the outside via the antenna, and the measurement accuracy can be further improved.

  In the wireless thermometer of the present invention, the first antenna and the second antenna are formed by a wound coil that is magnetically coupled to an external antenna.

  In this configuration, a specific configuration of the first antenna and the second antenna in the case of employing proximity and magnetic field coupling type (electromagnetic induction type) wireless communication is shown. With this configuration, since the influence of the test object on the wireless communication can be reduced when using radio waves, the accuracy of the wireless communication can be improved.

  In addition, the wireless thermometer of the present invention has a wound conductor having an inner diameter and an outer diameter larger than those of the first antenna and the second antenna, and the resonance frequency of the wound conductor has the first detection signal and the second detection frequency. A relay antenna that substantially matches the frequency of the signal is provided. The wound conductor of the relay antenna is disposed so as to surround the heat insulator outside the outer surface or the outer surface of the heat insulator.

  In this configuration, the relay antenna can be used for transmitting the first detection signal and the second detection signal by the first antenna and the second antenna, so that the radiation efficiency to the outside can be improved and the communication efficiency can be improved.

  In the wireless thermometer according to the present invention, the first temperature detecting means is arranged on the center side of the coiled shape of the first antenna. The second temperature detection means is arranged on the center side of the coiled shape of the second antenna.

  In this configuration, the first temperature detection means is arranged in the area occupied by the first antenna, and the second temperature detection means is arranged in the area occupied by the second antenna. Thereby, a space-saving wireless thermometer can be achieved.

  In the wireless thermometer of the present invention, the first temperature detecting means and the second temperature detecting means are operated by a radio signal from the outside and are directly connected to the first antenna and the second antenna. The temperature sensor element has a function of transmitting the detected temperature to the outside.

  In this configuration, there is no driving device for driving the temperature sensor, that is, no heating element is provided. Furthermore, a temperature sensor is directly connected to the antenna. Therefore, the temperature of the test warm body can be measured more accurately.

  In the wireless thermometer according to the present invention, the first temperature detecting means and the second temperature detecting means are composed of piezoelectric resonators.

  This configuration shows a specific example of the first and second temperature detection means.

  In the wireless thermometer of the present invention, the piezoelectric resonator is a crystal resonator. In the wireless thermometer of the present invention, the piezoelectric resonator is a surface acoustic wave resonator.

  These configurations show more specific examples of piezoelectric resonators. Due to the resonance frequency of each element and the shape of the antenna, it is easier to form a wireless thermometer with a simple structure when using wireless communication by magnetic field coupling, and it is elastic when using wireless communication using radio waves. Using a surface wave resonator makes it easier to form a wireless thermometer with a simple structure.

  In addition, the wireless thermometer of the present invention includes an RFID storing calibration data used when calculating the body temperature, separately from the first temperature detection means and the second temperature detection means.

  With this configuration, highly accurate body temperature measurement using calibration data can be realized.

  In the wireless thermometer of the present invention, the calibration data includes temperature-frequency correlation data of the first temperature detection means and the second temperature detection means, or a first correction coefficient calculated from the correlation data. .

  In the wireless thermometer of the present invention, the calibration data includes the thermal resistance of the heat insulator or the second correction coefficient calculated from the thermal resistance.

  In these configurations, specific examples of contents of calibration data are shown.

  In the wireless thermometer according to the present invention, at least one of the first temperature detection means and the second temperature detection means is an RFID-IC with a built-in temperature sensor.

  In this configuration, since an ID transmission function by RFID-IC is added, an identification ID can be added to at least one of the first detection signal and the second detection signal.

  In the wireless thermometer of the present invention, the RFID-IC stores calibration data used when calculating the body temperature.

  In this configuration, calibration data can also be transmitted, so that it can be used for highly accurate body temperature measurement using the calibration data.

  The present invention also provides the above-described wireless thermometer, transmission of input signals to the first temperature detecting means and the second temperature detecting means, the first detection signal, and the second detection signal to the wireless thermometer. A wireless body temperature measuring system comprising: The wireless thermometer of this wireless body temperature measuring system is mounted on the surface of the body to be examined. The parent device includes a parent device-side antenna unit that wirelessly communicates with a wireless thermometer, and a measurement processing unit that measures the deep body temperature of the temperature to be detected based on the first detection signal and the second detection signal.

  In this configuration, a wireless body temperature measuring system including the above-described wireless body thermometer is shown. Thus, the deep body temperature can be accurately measured by using the above-described wireless thermometer.

  In the wireless body temperature measurement system of the present invention, the measurement processing unit of the master unit uses the first detection signal, the second detection signal, and the calibration data received from the wireless thermometer, and uses the first detection signal and the calibration data. Measure body temperature.

  In this configuration, by using the calibration data acquired from the wireless thermometer, the deep body temperature of the test body can be measured with higher accuracy.

  According to the present invention, it is possible to realize a wireless thermometer that can accurately measure the deep body temperature.

It is a figure which shows the structure of the radio | wireless thermometer 10 which concerns on 1st Embodiment. It is a figure which shows the implementation condition of the radio | wireless body temperature measuring system 1 which concerns on 1st Embodiment. 1 is a block diagram showing a main circuit configuration of a wireless body temperature measurement system 1 according to a first embodiment. It is a figure which shows the structure of 10 A of radio | wireless thermometers which are the modifications of the radio | wireless thermometer 10 which concerns on 1st Embodiment. It is a figure which shows the structure of 10 A of radio | wireless thermometers which concern on 2nd Embodiment. It is a figure which shows the structure of the radio | wireless thermometer 10B which concerns on 3rd Embodiment. It is a figure which shows the structure of 10 C of radio | wireless thermometers which concern on 4th Embodiment. It is a figure which shows the structure of radio | wireless thermometer 10D which concerns on 5th Embodiment. It is a table | surface which shows an example of the data for calibration. It is a block diagram which shows the main circuit structures of the radio | wireless body temperature measurement system 1D which concerns on 5th Embodiment. It is a figure which shows the structure of the radio | wireless thermometer 40 which concerns on 6th Embodiment.

  A wireless thermometer and a wireless body temperature measuring system according to a first embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case where communication is performed between the wireless thermometer 10 and the portable parent terminal 20 by magnetic field coupling is shown. The communication mode is not limited to magnetic field coupling, but may be based on other wireless communication methods such as electric field coupling and radio waves. FIG. 1 is a diagram showing a configuration of a wireless thermometer 10 according to the present embodiment. FIG. 1A is a top view in a state where the top heat insulator 141 is omitted, FIG. 1B is a side cross-sectional view, and FIG. 1C is a bottom view in a state where the bottom heat insulator 142 is omitted.

Radio thermometers 10 includes a flexible, which has an insulating property, a heat insulating member 130 having a predetermined thermal resistance [rho _T. The heat insulator 130 is circular in plan view (viewed from the upper surface side or the lower surface side) and has a predetermined thickness D. Insulation 130 is used substantially the material of the same thermal resistivity [rho _T and thermal resistance of the thermometer body.

  On the upper surface (one surface) of the heat insulator 130, a coiled coil electrode 121 is formed over a substantially entire region. The coil electrode 121 is formed in a shape corresponding to a first frequency for performing communication by magnetic field coupling between the wireless thermometer 10 and the portable parent terminal 20. This coil electrode 121 corresponds to the first antenna of the present invention.

  A crystal resonator 111 is disposed at the approximate center of the coil electrode 121 on the upper surface of the heat insulator 130 in a plan view. The crystal unit 111 and the coil electrode 121 are connected by a conductive electrode pattern.

  The crystal unit 111 is an element that resonates at a predetermined resonance frequency fp1 according to the sensed temperature. This crystal unit 111 corresponds to the first temperature detecting means of the present invention.

  An upper surface heat insulator 141 that protects the coil electrode 121 and the crystal unit 111 is disposed on the upper surface of the heat insulator 130. At this time, the top heat insulator 141 may be disposed so that the surface of the crystal unit 111 is exposed, or may be disposed so as to cover the surface of the crystal unit 111. In addition, this upper surface heat insulator 141 can be omitted.

  On the lower surface (the other surface) of the heat insulator 130, a coiled coil electrode 122 is formed over a substantially entire region. The coil electrode 122 is formed in a shape corresponding to a second frequency for performing communication by magnetic field coupling between the wireless thermometer 10 and the portable parent terminal 20. At this time, the second frequency is set to a frequency different from the first frequency described above. This coil electrode 122 corresponds to the second antenna of the present invention. That is, the coil electrodes 121 and 122 are formed so that the first antenna and the second antenna perform wireless communication in different frequency bands. However, when the first frequency and the second frequency are set close to each other, the coil electrodes 121 and 122 can be formed in the same shape.

  A crystal resonator 112 is disposed at the approximate center of the coil electrode 122 on the lower surface of the heat insulator 130 in a plan view. At this time, the crystal unit 112 is disposed at a position that substantially overlaps the crystal unit 111 in plan view. The crystal unit 112 and the coil electrode 122 are connected by a conductive electrode pattern.

  The crystal unit 112 is an element that resonates at a predetermined resonance frequency fp2 different from the above-described crystal unit 111 in accordance with the sensed temperature. In particular, in the wireless thermometer 10 of the present embodiment, the frequency band that the crystal resonator 111 can take and the frequency band that the crystal resonator 112 can take are different in the temperature range detected by the wireless thermometer 10. The vibrators 111 and 112 are selected. This crystal resonator 112 corresponds to the second temperature detecting means of the present invention.

  A lower surface heat insulator 142 that protects the coil electrode 122 and the crystal resonator 112 is disposed on the lower surface of the heat insulator 130. At this time, the lower surface heat insulator 142 is disposed so that the surface of the crystal unit 112 is exposed. If a material having good adsorptivity to the body surface is used as the lower surface heat insulator 142, it is difficult to peel off from the body surface at the time of temperature measurement, and the body temperature can be measured more smoothly. Note that the lower surface heat insulator 142 can be omitted. In that case, the heat insulator 130 may be made of a material having good adsorptivity to the body surface.

As described above, in the wireless thermometer 10 of the present embodiment, the coil electrode 121 serves as an antenna for the crystal resonator 111, and the coil electrode 122 serves as an antenna for the crystal resonator 112. In other words, a separate antenna is provided for each of the crystal resonators 111 and 112. Thereby, the crystal resonators 111 and 112 are not electrically connected by the conductive electrode pattern, that is, the electrode pattern having a thermal conductivity different from that of the heat insulator 130. As a result, improved the crystal frequency of the oscillator 111 (sensed temperature), heat R _T resistor and core temperature calculation accuracy of using from heat resistivity [rho _T and the thickness D of the insulating body 130 to be described later To do.

  The wireless thermometer 10 configured as described above is used in a wireless thermometer measurement system 1 as shown in FIGS. FIG. 2 is a diagram showing an implementation status of the wireless body temperature measurement system 1 according to the present embodiment. FIG. 3 is a block diagram showing a main circuit configuration of the wireless body temperature measuring system 1 according to the present embodiment.

  First, the lower surface of the wireless thermometer 10 on which the quartz crystal vibrator 112 and the coil electrode 122 are disposed is attached to the arm 900A of a person 900 that is a test body. In addition, although the case where it mounts | wears with an arm was shown in this embodiment, what is necessary is just to mount | wear to the location (for example, the chest etc. of the person 900) which wants to measure temperature.

  Thus, the first pulse signal SpL1 and the second pulse signal SpL2 are transmitted from the portable master terminal 20 to the wireless thermometer 10 attached to the person 900. At this time, the portable master terminal 20 transmits the first pulse signal SpL1 and the second pulse signal SpL2 close to a distance allowing communication by magnetic field coupling between the coil electrodes 121 and 122 of the wireless thermometer 10.

  The first pulse signal SpL1 is received by the coil electrode 121 and applied to the crystal unit 111. The crystal unit 111 resonates with the first pulse signal SpL1 and outputs the first resonance signal Sfp1. The first resonance signal Sfp1 corresponds to the first detection signal of the present invention. The first resonance signal Sfp1 is transmitted to the coil electrode 121. The first resonance signal Sfp1 transmitted to the coil electrode 121 is transmitted to the portable parent terminal 20 by magnetic field coupling.

Here, the frequency fp1 of the first resonance signal Sfp1 varies depending on the temperature sensed by the crystal unit 111, and the temperature is uniquely determined for one resonance frequency. Unique Specifically, the resonance frequency fp1, depending on the temperature that is thermally conducted to the outside air via the heat insulating member 130 which the body temperature of the arm 900A is made from the thickness D in the thermal resistance [rho _T human 900 is temperature measuring portion The first resonance signal Sfp1 having the resonance frequency fp1 is output.

  The second pulse signal SpL2 is received by the coil electrode 122 and applied to the crystal unit 112. The crystal unit 112 resonates with the second pulse signal SpL2 and outputs a second resonance signal Sfp2. This second resonance signal Sfp2 corresponds to the second detection signal of the present invention. The second resonance signal Sfp2 is transmitted to the coil electrode 122. The second resonance signal Sfp2 transmitted to the coil electrode 122 is transmitted to the portable parent terminal 20 by magnetic field coupling.

  Here, the frequency fp2 of the second resonance signal Sfp2 varies depending on the temperature sensed by the crystal unit 112, and the temperature is uniquely determined for one resonance frequency. Specifically, the resonance frequency fp2 is uniquely determined according to the body temperature of the arm 900A of the person 900 that is the temperature measurement unit, and the second resonance signal Sfp2 having the resonance frequency fp2 is output.

  The portable parent terminal 20 includes a control unit 21, a transmission signal generation unit 22, a transmission / reception unit 23, a parent device side antenna 24, a measurement unit 25, a display unit 26, and an operation unit 27. The control unit 21 performs overall control of the portable parent terminal 20. Further, the control unit 21 executes various control processes in accordance with operation inputs from the operation unit 27. For example, when receiving an operation input for body temperature measurement from the operation unit 27, first, the transmission signal generation unit 22 is controlled to generate the first pulse signal SpL1.

  When the transmission signal generation unit 22 receives the generation control of the first pulse signal SpL1, the transmission signal generation unit 22 generates the first pulse signal SpL1 including a carrier wave of the first frequency and supplies the transmission / reception unit 23 with the first pulse signal SpL1. Specifically, the carrier wave frequency is the crystal frequency so that the frequency component of the first pulse signal SpL1 is substantially the same as the frequency band that the crystal resonator 111 can take in the temperature range detected by the wireless thermometer 10. The frequency close to the resonance frequency of the vibrator 111 is set, and the pulse width (burst time) for determining the bandwidth is set to an appropriate value.

  The transmitter / receiver 23 outputs the first pulse signal SpL1 to the parent device side antenna 24. The base unit side antenna 24 has the same structure as the antenna unit 12 of the wireless thermometer 10, and radiates the first pulse signal SpL1.

  The base-unit-side antenna 24 receives the first resonance signal Sfp <b> 1 radiated from the coil electrode 121 of the wireless thermometer 10 and outputs it to the transmission / reception unit 23. The transmission / reception unit 23 outputs the first resonance signal Sfp1 to the measurement unit 25.

  The control unit 21 generates the second pulse signal SpL2 to the transmission signal generation unit 22 after confirming reception of the first resonance signal Sfp1 or after a predetermined time has elapsed from the generation control of the first pulse signal SpL1 to the transmission signal generation unit 22. Take control.

  When the transmission signal generation unit 22 receives the generation control of the second pulse signal SpL2, the transmission signal generation unit 22 generates the second pulse signal SpL2 including a carrier wave having a second frequency different from the first frequency and supplies the second pulse signal SpL2 to the transmission / reception unit 23. Specifically, the second pulse signal SpL2 is set so that the frequency component of the second pulse signal SpL2 is substantially the same as the frequency band that the crystal resonator 112 can take in the temperature range detected by the wireless thermometer 10. The carrier frequency is set to a frequency close to the resonance frequency of the crystal unit 112, and the pulse width (burst time) for determining the bandwidth is set to an appropriate value.

  The base-unit-side antenna 24 receives the second resonance signal Sfp <b> 2 radiated from the coil electrode 121 of the wireless thermometer 10 and outputs it to the transmission / reception unit 23. The transmission / reception unit 23 outputs the second resonance signal Sfp2 to the measurement unit 25.

  The measurement unit 25 includes a frequency conversion unit 251, a temperature detection unit 252, and a body temperature calculation unit 253. The frequency conversion unit 251 acquires frequency spectra from the first resonance signal Sfp1 and the second resonance signal Sfp2 on the time axis by FFT processing or the like. In the present embodiment, the case where the first resonance signal Sfp1 and the second resonance signal Sfp2 are read separately has been described. However, in the temperature range detected by the wireless thermometer 10, the frequency band that can be taken by the crystal unit 111 and the frequency band that can be taken by the crystal unit 112 are kept as close as possible, and a wide frequency component including two frequency bands. By transmitting a pulse signal having a signal, the first resonance signal Sfp1 and the second resonance signal Sfp2 can be measured simultaneously by a single transmission / reception.

  The temperature detection unit 252 stores in advance the relationship between the frequency and the temperature of the first resonance signal Sfp1 and the relationship between the frequency and the temperature of the second resonance signal Sfp2.

  The temperature detector 252 detects the frequency spectrum peak of the first resonance signal Sfp1, and outputs the temperature associated with the peak frequency fp1 as the outside air side temperature Ts.

  The temperature detector 252 detects the frequency spectrum peak of the second resonance signal Sfp2, and outputs the temperature associated with the peak frequency fp2 as the body surface temperature Tb.

The body temperature calculation unit 253 calculates the outside air side temperature Ts, the body surface temperature Tb, the thermal insulation 130 _RT between the quartz crystal vibrator 111 and the quartz crystal vibrator 112, and the thermal resistance R _{u of the} subcutaneous tissue stored in advance. Based on the following equation, the deep body temperature Td of the test temperature body is calculated.

Td = Ts + (R _T + R _u ) · (Tb−Ts) / R _T
The calculated deep body temperature Td is output to the display unit 26 and the storage unit (not shown). The display unit 26 displays the deep body temperature measurement result.

  With the configuration as described above, the deep body temperature of the person 900 can be measured only by remotely giving a body temperature detection trigger from the portable parent terminal 20.

  Then, by using the configuration of this embodiment, between the crystal resonator 112 that detects the body surface temperature Tb and the crystal resonator 111 that detects the outside air temperature Ts in the process until the body temperature is radiated to the outside air. The heat propagation through the heat insulator 130 only. Therefore, since it exactly coincides with the heat propagation model that is the basis of the above-described equation for calculating the deep body temperature Td, the deep body temperature Td can be calculated with high accuracy.

  In the description of the present embodiment, an example in which the surfaces of the crystal resonators 111 and 112 are exposed to the outside is shown, but a configuration as shown in FIG. 4 may be used. FIG. 4 is a diagram illustrating a configuration of a wireless thermometer 10 ′ that is a modification of the wireless thermometer 10 according to the present embodiment.

  The wireless thermometer 10 ′ has a configuration in which the wireless thermometer 10 shown in FIG. 1 is covered with a heat insulator 151 different from the heat insulating material 130. It is desirable that the heat insulator 151 be made of a material having a sufficiently high thermal resistivity with respect to the heat insulator 130 and the subcutaneous tissue.

  The heat insulator 151 has a shape that covers a surface (an upper surface on the outside air side) and a side surface (circumferential surface) on the side where the crystal unit 111 of the heat insulator 130 serving as a core as a thermometer is disposed.

  By adopting such a configuration, it becomes possible to reduce the influence of the outside air, and it is possible to further improve the calculation accuracy of the deep body temperature under use conditions in which a sudden change in the outside air temperature occurs.

  Next, a wireless thermometer according to the second embodiment will be described with reference to the drawings. FIG. 5 is a diagram showing a configuration of a wireless thermometer 10A according to the present embodiment. 5A is a top view in a state in which the top heat insulator 141 is omitted, FIG. 5B is a side sectional view, and FIG. 5C is a bottom view in a state in which the bottom heat insulator 142 is omitted.

  The wireless thermometers 10 and 10 'shown in the first embodiment are arranged such that one crystal unit is disposed on each of the outside air side and the body surface side, and the deep body temperature is measured using these sets. . However, the wireless thermometer 10A of the present embodiment is provided with a plurality of sets of crystal resonators on the outside air side and the body surface side. In the present embodiment, an example in which two sets of crystal resonators on the outside air side and the body surface side are specifically provided is shown, but three or more sets may be used.

  The heat insulator serving as a core includes a heat insulator 130B having a predetermined area in plan view at the center, and a heat insulator 130A disposed so as to fill the periphery of the heat insulator 130B in plan view.

  A coiled coil electrode 121A is formed on the upper surface of the heat insulator 130A, and a quartz crystal vibrator 111A is disposed at a substantially central plane of the coil electrode 121A. The coil electrode 121A and the crystal unit 111A are connected by a conductive electrode pattern.

  A coil electrode 122A having a winding shape is formed on the lower surface of the heat insulator 130A, and a quartz crystal vibrator 112A is disposed at a substantially center when the coil electrode 122A is planar. At this time, the crystal unit 112A is disposed so as to overlap the crystal unit 111A in plan view. The coil electrode 122A and the crystal resonator 112A are connected by a conductive electrode pattern. With this configuration, a set of crystal units with an antenna for measuring the deep body temperature is realized.

  A coil electrode 121B having a winding shape is formed on the upper surface of the heat insulator 130B, and a crystal resonator 111B is disposed at a substantially center when the coil electrode 121B is planarized. The coil electrode 121B and the crystal unit 111B are connected by a conductive electrode pattern.

  A coil electrode 122B having a winding shape is formed on the lower surface of the heat insulator 130B, and a crystal resonator 112B is disposed at a substantially center when the coil electrode 122B is planarized. At this time, the crystal unit 112B is disposed so as to overlap the crystal unit 111B in plan view. The coil electrode 122B and the crystal resonator 112B are connected by a conductive electrode pattern. With this configuration, another set of crystal units with antennas for measuring the deep body temperature is realized.

  Note that the resonance frequencies of the crystal resonators 111A, 112A, 111B, and 112B do not overlap in the detection target temperature range. Thereby, the portable parent terminal can easily identify the detection signals from the respective crystal resonators 111A, 112A, 111B, and 112B.

  Then, as shown in the present embodiment, the deep body temperature can be measured with higher reliability by calculating the deep body temperature based on the temperature detection results in two different heat transfer paths.

  Next, a wireless thermometer according to a third embodiment will be described with reference to the drawings. FIG. 6 is a diagram showing a configuration of a wireless thermometer 10B according to the present embodiment. 6A is a top view in a state in which the top heat insulator 141 is omitted, FIG. 6B is a side sectional view, and FIG. 6C is a bottom view in a state in which the bottom heat insulator 142 is omitted.

  In the wireless thermometer 10A shown in the second embodiment, the case where the shapes of the coil electrodes 121A, 121B, 122A, 122B constituting each antenna are substantially the same is shown. However, the wireless thermometer 10B of the present embodiment includes a coil electrode having a large diameter to be wound and a coil electrode having a small diameter to be wound on the same surface. The configurations of the heat insulators 130A and 130B are the same as those in the second embodiment.

  A coiled coil electrode 121C is formed on the upper surface of the heat insulator 130A. The coil electrode 121C is formed with a large diameter so as to be wound around the outer periphery of the heat insulator 130A. A crystal resonator 111C is arranged at a predetermined position in a region that becomes the surface of the heat insulator 130A inside the coil electrode 121C. The coil electrode 121C and the crystal resonator 111C are connected by a conductive electrode pattern.

  A wound coil electrode 122C is formed on the lower surface of the heat insulator 130A. The coil electrode 122C is formed with a large diameter so as to be wound around the outer periphery of the heat insulator 130A. A quartz crystal vibrator 112C is disposed at a predetermined position in a region that becomes the surface of the heat insulator 130A inside the coil electrode 122C.

  At this time, the crystal unit 112C is disposed so as to overlap the crystal unit 111C in plan view. The coil electrode 122C and the crystal resonator 112C are connected by a conductive electrode pattern. With this configuration, a set of crystal units with an antenna for measuring the deep body temperature is realized.

  A coiled coil electrode 121B is formed on the upper surface of the heat insulator 130B, as in the second embodiment, and a crystal resonator 111B is disposed at the approximate center of the planar surface of the coil electrode 121B. . The coil electrode 121B and the crystal unit 111B are connected by a conductive electrode pattern.

  A coiled coil electrode 122B is formed on the lower surface of the heat insulator 130B, as in the second embodiment, and a quartz crystal vibrator 112B is disposed at a substantially central plane of the coil electrode 122B. . At this time, the crystal unit 112B is disposed so as to overlap the crystal unit 111B in plan view. The coil electrode 122B and the crystal resonator 112B are connected by a conductive electrode pattern. With this configuration, another set of crystal units with antennas for measuring the deep body temperature is realized.

  Note that the resonance frequencies of the crystal resonators 111B, 112B, 111C, and 112C do not overlap in the detection target temperature range. Thereby, the portable parent terminal can easily identify the detection signals from the respective crystal resonators 111B, 112B, 111C, and 112C.

  And even if the structure of this embodiment is used, based on the temperature detection result in two different heat transfer paths, the deep body temperature can be calculated. Thereby, similarly to 2nd Embodiment, the deep part body temperature with higher reliability can be measured.

  Next, a wireless thermometer according to a fourth embodiment will be described with reference to the drawings. FIG. 7 is a diagram showing a configuration of a wireless thermometer 10C according to the present embodiment. FIG. 7A is a top view in a state where the top heat insulator 141 is omitted, FIG. 7B is a side cross-sectional view, and FIG. 7C is a bottom view in a state where the bottom heat insulator 142 is omitted.

  The wireless thermometer 10C of the present embodiment shares the coil electrode 121BC with the crystal resonator 111B and the crystal resonator 111C disposed on the same plane as the wireless thermometer 10B shown in the third embodiment. It is different in point to do. That is, similarly to the coil electrode 121C shown in the third embodiment, a crystal oscillator 111C disposed on the heat insulator 130A with respect to the coil electrode 121BC formed with a large diameter near the outer periphery of the heat insulator 130A, A crystal resonator 111B disposed on the heat insulator 130B is connected in parallel. At this time, the coil electrode 121BC is formed in a shape capable of magnetic field coupling type wireless communication in each frequency band of the quartz crystal vibrator 111B and the quartz crystal vibrator 111C to be temperature-measured.

  Even in such a configuration, the quartz vibrators arranged with the heat insulators 130A and 130B sandwiched therebetween are not connected by the conductive electrode pattern. Can be measured.

  Next, a wireless thermometer according to a fifth embodiment will be described with reference to the drawings. FIG. 8 is a diagram showing a configuration of a wireless thermometer 10D according to the present embodiment. 8A is a top view in a state in which the top heat insulator 141 is omitted, FIG. 8B is a side sectional view, and FIG. 8C is a bottom view in a state in which the bottom heat insulator 142 is omitted. FIG. 9 is a table showing an example of calibration data.

  The wireless thermometer 10D of this embodiment has a configuration in which an RFID 160 is further added to the wireless thermometer 10 shown in the first embodiment. Therefore, only the configuration different from the first embodiment will be specifically described.

  Since the antenna coil for transmission / reception is shared by the RFID 160 and the crystal resonators 111 and 112, the operating frequency fp3 of the RFID 160 and the resonance frequencies fp1 and fp2 of the crystal resonators 111 and 112 are set to be close to each other. Specifically, when HF band RFID of fp3 = 13.56 MHz is used, it is preferable that fp1, fp2, are within a range of 13.56 MHz ± 1 MHz.

  The RFID 160 is disposed on the upper surface of the heat insulator 130 in the same manner as the crystal unit 111. The RFID 160 is connected in parallel to a coiled coil electrode 121 to which the crystal unit 111 is connected. That is, the crystal unit 111 and the RFID 160 share the coil electrode 121.

  The RFID 160 stores calibration data related to the crystal resonators 111 and 112 and the heat insulating material 130 provided in the wireless thermometer 10D. Note that these calibration data are set based on the results measured in advance in a known atmosphere (particularly temperature).

  As shown in FIG. 9, the calibration data regarding the resonance frequency fp1 of the crystal unit 111 is the peak frequency (low temperature side peak) of the crystal unit 111 disposed in the wireless thermometer 10D at the preset first temperature TL. Frequency) f1L, and a peak frequency (high temperature side peak frequency) f1H of the crystal resonator 111 disposed in the wireless thermometer 10D at the second temperature TH (> TL). Therefore, the calibration data related to the crystal unit 111 includes a set of the first temperature TL and the low temperature side peak frequency f1L (TL, f1L), and a set of the second temperature TH and the high temperature side peak frequency f1H (TH, f1H). Consists of.

  Similarly, the calibration data relating to the resonance frequency fp2 of the crystal unit 112 is the peak frequency (low temperature side peak frequency) f2L of the crystal unit 112 disposed in the wireless thermometer 10D at the preset first temperature TL. The peak frequency (high temperature side peak frequency) f2H of the crystal resonator 112 disposed in the wireless thermometer 10D at the second temperature TH (> TL). Therefore, the calibration data related to the crystal resonator 112 includes a set of the first temperature TL and the low temperature side peak frequency f2L (TL, f2L), and a set of the second temperature TH and the high temperature side peak frequency f2H (TH, f2H). Consists of.

Specifically, the following values are input to the RFID.
(TL, f1L) = (35.01, 13.001),
(TH, f1H) = (40.02, 13.051),
(TL, f2L) = (35.03, 13.003),
(TH, f2H) = (40.04, 13.052),
RT = 2001.

When inputting to the RFID, it is sufficient to input up to a digit within the variation range of the input value. For example, the input may be as follows.
(TL, f1L) = (1, 01),
(TH, f1H) = (2, 51),
(TL, f2L) = (3, 03),
(TH, f2H) = (4, 52),
RT = 01.
By doing in this way, the amount of RFID memory used can be reduced.

  The first temperature TL and the second temperature TH need only satisfy the above-described relationship TL <TH, but may be set to the lower limit temperature and the upper limit temperature of the measurement temperature range targeted by the wireless thermometer 10D. .

The calibration data related to the heat insulator 130 includes the thermal resistance RT of the heat insulator 130 disposed in the wireless thermometer 10D. The thermal resistance RT is the thermal resistance value obtained from the composition of the insulation body 130 may be used as it is, the core temperature is known measurement environment, the thermal resistance R _u of the subcutaneous tissue in a known fixed value, above If the characteristics of the quartz crystal resonators 111 and 112 are known, the calculation can be performed using the calculation formula for the deep body temperature Td shown in the first embodiment.

  The RFID 160 returns an RFID reply signal Sre including calibration data composed of these components to the parent device according to the RFID inquiry signal Sq from the parent device.

  Next, a wireless body temperature measurement system 1D including a wireless body thermometer 10D provided with such an RFID 160 will be described with reference to the drawings. This wireless body temperature measurement system 1D has the same basic configuration and processing relating to body temperature measurement as the wireless body temperature measurement system 10 shown in the first embodiment, and is different only in the part related to calibration data. Therefore, FIG. 10 is a block diagram showing a main circuit configuration of the wireless body temperature measurement system 1D according to the present embodiment only in different places.

  When the base station side antenna 24 receives the RFID reply signal Sre including the calibration data, the RFID reply signal Sre is input to the control unit 21A via the transmission / reception unit 23A.

  The control unit 21A demodulates the RFID reply signal Sre, acquires calibration data, and provides it to the measurement unit 25A.

  The temperature detection unit 252A of the measurement unit 25A uses the calibration data and the frequency of the first resonance signal Sfp1 and the frequency of the second resonance signal Sfp2 from the frequency conversion unit 251 acquired by the method of the above-described embodiment. The outside air side temperature Ts and the body surface temperature Tb are calculated.

  Specifically, the temperature detection unit 252A includes a set (TL, f1L) of the first temperature TL and the low temperature side peak frequency f1L of the calibration data, and a set (TH of the second temperature TH and the high temperature side peak frequency f1H). , F1H), the temperature-frequency characteristic is calculated by linear interpolation, and the temperature corresponding to the frequency of the first resonance signal Sfp1 is calculated as the outside air temperature Ts.

  The temperature detector 252A also includes a first temperature TL and low temperature side peak frequency f2L set (TL, f2L) of calibration data, and a second temperature TH and high temperature side peak frequency f2H set (TH, f2H). Then, the temperature-frequency characteristic is calculated by linear interpolation, and the temperature corresponding to the frequency of the second resonance signal Sfp2 is calculated as the outside air temperature Ts.

  The body temperature calculation unit 253A uses the outside air temperature Ts and the outside air temperature Ts calculated using the calibration data by the temperature detection unit 252A, and the thermal resistance RT of the calibration data, as described in the first embodiment. As shown in Fig. 5, the deep body temperature Td is calculated.

  If the configuration as described above is used, accurate body temperature measurement can be performed using calibration data even if the quartz crystal vibrators 111 and 112 and the heat insulator 130 vary in characteristics for each wireless thermometer 10D.

  In this embodiment, an example in which peak frequencies at two different temperatures are used as calibration data is shown. However, the peak frequency at one temperature and an interpolation coefficient for linear interpolation (gradient (gradient) of temperature-frequency characteristics). A correction coefficient obtained from the above-described correlation between temperature and frequency may be used as calibration data. Further, regarding the thermal resistance of the heat insulating material, a correction coefficient calculated from the thermal resistance may be used as calibration data. Furthermore, if the storage capacity of the RFID 160 can be increased, the relationship between the resonance frequency of each crystal resonator 111 and 112 and the deep body temperature Td can be stored in advance, and these relationships can be used as calibration data. .

  In the present embodiment, the example in which the RFID 160 and the crystal unit 111 are separately provided has been described. However, if the temperature sensor is provided as the RFID IC, only the crystal unit disposed on at least one surface of the heat insulator is provided. However, it may be replaced with RFIDIC.

  In the present embodiment, the quartz resonator 111 and the RFID 160 share the antenna, but separate antennas may be provided.

  In the present embodiment, the example in which the RFID 160 is provided on the outside air side of the heat insulator 130 has been described. However, the RFID 160 may be provided on the body surface side.

  Further, in the present embodiment, an example is shown in which body temperature measurement and calibration data are sequentially read individually, but these may be performed simultaneously. In this case, the first pulse signal SpL1 for body temperature measurement is combined with the RFID inquiry signal Sq and output from the antenna coil.

  Further, in the above description, the case where the shape of the heat insulator is circular in a plan view is shown, but the shape is not limited to a circle, and the shape is a polygon such as a rectangle in plan view. It may be. Similarly, the coil electrode is not limited to a shape wound in a circle, and can be wound into a polygon such as a rectangle if the frequency band for transmitting and receiving waves is appropriately set as described above. Also good.

  In the above description, an example using a magnetic field coupling type antenna has been described. However, a radio wave transmission / reception type antenna such as a patch antenna may be used.

  In the above description, the example in which the crystal resonator is arranged inside the winding shape of the coil electrode is shown, but the crystal resonator may be arranged outside the winding shape. However, the wireless thermometer can be miniaturized by arranging the crystal resonator inside the winding shape of the coil electrode.

  In the above description, the crystal resonator has been described as an example. However, any piezoelectric resonator having a large frequency temperature characteristic may be used, and a surface acoustic wave resonator may be used. In particular, when a surface acoustic wave resonator is used, it is easier to match the resonance frequency to a high frequency that can reduce the size of a radio wave communication antenna such as a UHF band as compared with a crystal resonator. A wireless thermometer that performs wireless communication can be easily manufactured.

  Moreover, the calculation method of the deep body temperature shown by the above-mentioned description is an example, and other calculation methods using the body surface side temperature and the outside air side temperature may be used.

  In addition, as shown in each of the above-described embodiments, particularly the above-described second embodiment, a plurality of temperature detecting vibrators and a coil electrode to be an antenna are formed on the upper surface and the lower surface. May become smaller. In this case, the distance that can be electromagnetically coupled to the outside may be shortened. In such a case, a wireless thermometer as shown in the sixth embodiment shown below may be used. FIG. 11 is a diagram illustrating a configuration of the wireless thermometer 40 according to the present embodiment. FIG. 11A is a top view in a state in which the top heat insulator 141 is omitted, and FIG. 11B is a side cross-sectional view.

  As shown in FIG. 11, the wireless thermometer 40 of this embodiment includes the wireless thermometer 10 </ b> A shown in the second embodiment and the relay antenna 30. Since the wireless thermometer 10A for temperature detection is the same as that of the second embodiment, only the relay antenna 30 will be described in detail.

  The relay antenna 30 includes a ring-shaped base film 31 having insulating properties and a coil electrode 32 having a wound shape. The inner diameter of the annular shape of the base film 31 is larger than the outer diameter of the wireless thermometer 10A in plan view. The length obtained by subtracting the inner diameter from the width and outer diameter of the base film 31 is a predetermined length such that the coil electrode 32 can be formed. In addition, the base film 31 is good in a material with the good adsorptivity to a body surface.

  The coil electrode 32 is formed on the upper surface of the base film 31 in a shape that goes around the entire circumference of the base film 31, and is formed in a shape that provides a predetermined inductance and a predetermined parasitic capacitance. At this time, the electrode width of the coil electrode 32 is set so that the resonance frequency due to the inductance and parasitic capacitance based on the shape of the coil electrode 32 overlaps the frequency band of signals transmitted and received between the wireless thermometer 10A and the portable parent terminal (not shown). The electrode spacing and the number of turns are determined. In addition, although the example using a parasitic capacitance was shown here, the aspect which mounts a chip capacitor in the base film 31, and connects to the coil electrode 32 may be sufficient.

  The wireless thermometer 10 </ b> A is arranged in the hollow area of the relay antenna 30 having such a structure. Specifically, first, the relay antenna 30 is attached to a temperature measuring unit (such as a human arm). Next, the wireless thermometer 10 </ b> A is attached to the temperature measuring unit exposed in the hollow area of the relay antenna 30. Thereby, the state which maintained 10 A of wireless thermometers in the hollow area | region of the relay antenna 30 is realizable.

  In the wireless thermometer having such a structure, signals transmitted / received by the coil electrodes 121A, 121B, 122A, 122B are transmitted / received only by the coil electrodes 121A, 121B, 122A, 122B via the relay antenna 30. In addition, it is possible to transmit and receive up to a long distance. In other words, even if the coil electrodes 121A, 121B, 122A, 122B are made smaller in shape, transmission / reception at a distance required as a wireless thermometer becomes possible.

  Further, by using the relay antenna 30, instead of the coil electrodes 121A, 121B, 122A, 122B, a coil, a crystal, which is wound around the outer surface of a temperature sensor element including a chip inductor and a crystal resonator, A coil or the like built in a temperature sensor including a vibrator can also be used.

  In the above description, the example in which the relay antenna 30 and the wireless thermometer 10A are separately formed has been shown. However, for example, the base film 31 of the relay antenna 30 and the lower surface heat insulator 142 of the wireless thermometer 10A are provided. You may form integrally.

  Moreover, although the example which forms the relay antenna 30 from the base film 31 and the coil electrode 32 was shown in the above-mentioned description, the base film 31 was abbreviate | omitted and the coil electrode 32 was followed along the outer surface of 10 A of radio | wireless thermometers. It may be formed.

  In the above description, the combination of the relay antenna 30 and the wireless thermometer 10A has been described. However, the wireless thermometer of another embodiment and the relay antenna 30 may be combined.

10, 10 ′, 10A, 10B, 10C, 10D—wireless thermometer, 20, 20A—portable parent terminal, 21, 21A—control unit, 22—transmission signal generation unit, 23, 23A—transmission / reception unit, 24-parent Machine side antenna, 25,25A-measurement unit, 251-frequency conversion unit, 252,252A-temperature detection unit, 253,253A-body temperature calculation unit, 26-display unit, 27-operation unit,
30-relay antenna, 31-base film, 32-coil electrode,
111, 111A, 111B, 111C, 112, 112A, 112B, 112C—quartz crystal resonator, 121, 121A, 121B, 121C, 121BC, 122, 122A, 122B, 122C—coil electrode, 130, 130A, 130B—insulator, 141-upper surface insulator, 142-lower surface insulator, 151-insulator, 160-RFID, 900-person, 900A-arm, 1,1D-wireless body temperature measuring system

Claims (17)

A heat insulator formed of a material having a predetermined thermal resistivity;
First temperature detecting means disposed on one surface of the heat insulator;
A second temperature detecting means disposed on the other surface facing the one surface via the heat insulator;
A first antenna for transmitting a first detection signal output from the first temperature detection means;
A second antenna for transmitting a second detection signal output from the second temperature detection means,
The wireless thermometer, wherein the first antenna and the second antenna are independently formed individually. The wireless thermometer according to claim 1,
A wireless thermometer in which a plurality of the first temperature detecting means and the second temperature detecting means are provided. The wireless thermometer according to claim 1 or 2,
The wireless thermometer, wherein the first antenna and the second antenna are arranged in a region of one surface of the heat insulator or the other surface facing the one surface when the heat insulator is viewed in plan. A wireless thermometer according to any one of claims 1 to 3,
The first antenna and the second antenna are wireless thermometers formed by a wound coil that is magnetically coupled to an external antenna. The wireless thermometer according to claim 4, wherein
A relay having a wound conductor having an inner diameter and an outer diameter larger than those of the first antenna and the second antenna, and a resonance frequency of the wound conductor substantially matches a frequency of the first detection signal and the second detection signal. With an antenna,
The coiled conductor is a wireless thermometer that is disposed outside the outer surface or the outer surface of the heat insulator so as to surround the heat insulator. The wireless thermometer according to claim 4 or 5, wherein
The first temperature detecting means is disposed on the center side of the coiled shape of the coil constituting the first antenna,
The said 2nd temperature detection means is a radio | wireless thermometer arrange | positioned in the center side of the winding shape of the said coil which comprises the said 2nd antenna. The wireless thermometer according to any one of claims 1 to 6,
The first temperature detecting means and the second temperature detecting means are operated by a radio signal from the outside, and are directly connected to the first antenna and the second antenna, and detect the detected temperature. A wireless thermometer that is a temperature sensor element having a function of transmitting to the outside. The wireless thermometer according to claim 7,
The wireless thermometer, wherein the first temperature detecting means and the second temperature detecting means are made of piezoelectric resonators. The wireless thermometer according to claim 8, wherein
The wireless thermometer, wherein the piezoelectric resonator is a crystal resonator. The wireless thermometer according to claim 8, wherein
The wireless thermometer, wherein the piezoelectric resonator is a surface acoustic wave resonator. A wireless thermometer according to any one of claims 8 to 10,
A wireless thermometer comprising an RFID storing calibration data used when calculating a body temperature, separately from the first temperature detecting means and the second temperature detecting means. The wireless thermometer according to claim 11, wherein
The wireless thermometer, wherein the calibration data includes correlation data of temperature and frequency of the first temperature detection unit and the second temperature detection unit or a first correction coefficient calculated from the correlation data. A wireless thermometer according to claim 11 or claim 12,
The calibration data includes a wireless thermometer including a thermal resistance of the heat insulator or a second correction coefficient calculated from the thermal resistance. The wireless thermometer according to claim 7,
At least one of the first temperature detection unit and the second temperature detection unit is a wireless thermometer, which is an RFID-IC incorporating a temperature sensor. The wireless thermometer according to claim 14,
The RFID-IC is a wireless thermometer that stores calibration data used when calculating a body temperature. A wireless thermometer according to any one of claims 1 to 10 and claim 14,
A master unit for transmitting an input signal to the first temperature detection unit and the second temperature detection unit, and receiving the first detection signal and the second detection signal to the wireless thermometer; A wireless body temperature measurement system comprising:
The wireless thermometer is attached to the surface of a test body,
The base unit is a base unit side antenna unit that wirelessly communicates with the wireless thermometer,
A wireless body temperature measurement system, comprising: a measurement processing unit that measures a deep body temperature of the test body based on the first detection signal and the second detection signal. A wireless thermometer according to any one of claims 11, 12, 13 and 15,
A master unit for transmitting an input signal to the first temperature detection unit and the second temperature detection unit, and receiving the first detection signal and the second detection signal to the wireless thermometer; A wireless body temperature measurement system comprising:
The wireless thermometer is attached to the surface of a test body,
The base unit is a base unit side antenna unit that wirelessly communicates with the wireless thermometer,
A wireless body temperature measurement system, comprising: a measurement processing unit that measures the deep body temperature of the test body using the first detection signal, the second detection signal, and the calibration data.

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