JP2011191163A - Temperature measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturized temperature measuring device, accurately measuring a highly precise ambient temperature. <P>SOLUTION: This temperature measuring device includes: a first temperature measurement means 66A for measuring a first temperature of ambient air; a first reference temperature measurement means 70A that measures, as first reference temperature, temperature at a position which has a predetermined thermal resistance value between it and a measurement position of the first temperature and has a first thermal resistance value between it and a basic material; a second temperature measurement means 66B that measures second temperature at an ambient air position different from the measurement position of the first temperature; a second reference temperature measurement means 70B that measures, as second reference temperature, temperature at a position which has a predetermined thermal resistance value between it and a measurement position of the second temperature and has a second thermal resistance value between it and the basic material, the second thermal resistance value being different from the first thermal resistance value; and a temperature computation means that computes temperature of the ambient air by using the first temperature, the first reference temperature, the second temperature and the second reference temperature. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a temperature measuring device.

  In portable temperature measuring devices, particularly wristwatch-type temperature measuring devices, the outside air temperature is detected by a temperature sensor provided in the case or on the outer periphery of the case, and the detection result is displayed on a display unit configured on the surface of the case. It has become. However, with conventional temperature measuring devices, the temperature sensor is affected by body temperature through the case when being carried or worn, and the outside air temperature cannot be measured accurately. Therefore, for example, Patent Document 1 discloses a means for eliminating the influence of body temperature through the case by allowing the heat-sensitive portion to protrude from the case and providing a predetermined gap with the case.

JP-A-8-254579

  However, in the case of the means of Patent Document 1, the object is to reduce the influence of body temperature by devising the position of the temperature sensor. However, as long as it is worn as a wristwatch, there is a possibility that the influence of body temperature due to heat conduction of the case and the sensor support portion cannot be eliminated. Further, using a gap between the case and the temperature sensor or installing the temperature sensor at a position away from the wristwatch may cause a problem from the viewpoint of miniaturization.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] A first heat measuring unit having a predetermined thermal resistance value between a first temperature measuring unit for measuring a first temperature of the outside air and a measurement position of the first temperature, and a first heat between the base material and the substrate. A first reference temperature measuring means for measuring a temperature at a position having a resistance value as a first reference temperature; a second temperature measuring means for measuring a second temperature at an outside air position different from the measurement position of the first temperature; Refer to the temperature at a position having the predetermined thermal resistance value between the second temperature measurement position and the second thermal resistance value different from the first thermal resistance value between the second temperature and the base material. Second reference temperature measuring means for measuring the temperature, and temperature calculating means for calculating the temperature of the outside air using the first temperature, the first reference temperature, the second temperature, and the second reference temperature. A temperature measuring device comprising:

  According to this, when measuring the temperature with a wristwatch or the like, there is a method of using a heat insulating material or the like so as not to be affected by body temperature, but in the present invention, by using a sensor with different thermal resistance, It is possible to provide a temperature measuring device that is small and can accurately measure the outside air temperature with high accuracy.

  Application Example 2 In the above temperature measurement device, it is between the measurement position of the first temperature and the measurement position of the first reference temperature, and the measurement position of the second temperature and the measurement position of the second reference temperature. Is provided between the measurement position of the first reference temperature and the substrate, the first heat dissipation having the first thermal resistance value. A temperature measurement device, wherein a control unit is provided, and a second heat radiation control unit having the second thermal resistance value is provided between the measurement position of the second reference temperature and the base material.

  According to this, the 1st temperature measurement means and the 2nd temperature measurement means are covered with the heat insulation part which has a common thermal resistance value. Here, each heat insulation part is located between the measurement position of temperature, and the measurement position of reference temperature. And the 1st, 2nd heat dissipation control part which has a mutually different thermal resistance value between the measurement position of each reference temperature and a base material is provided. Therefore, the heat flux value between the first temperature measurement position and the first reference temperature measurement position and the heat flux value between the second temperature measurement position and the second reference temperature measurement position are different. That is, different values are measured for the first temperature, the first reference temperature, the second temperature, and the second reference temperature.

  Application Example 3 In the above temperature measurement device, a display device having a display unit for displaying the temperature of the outside air calculated by the temperature calculation unit, the first temperature measurement unit, and the second temperature measurement unit are provided. A thermometer main body, and the display device and the thermometer main body are configured separately.

  According to this, since the display device and the thermometer main body are configured separately, weight reduction of the thermometer main body having the first and second temperature measuring means that need to be in contact with the outside air is promoted. Therefore, even if the thermometer main body is brought into contact with the outside air for a long time, there is no burden, and continuous temperature monitoring can be performed over a long time.

  Application Example 4 In the above temperature measurement device, the temperature calculation unit is provided in the display device.

  According to this, since the outside air temperature calculating means is provided in the display device, the components of the thermometer main body are suppressed to the minimum. Therefore, weight reduction and size reduction of the thermometer main body are promoted, and the burden is further reduced even when the thermometer main body is brought into contact with the outside air, even if the measurement is performed for a long time.

  Application Example 5 In the above temperature measurement device, the display device and the thermometer main body each include transmission / reception means capable of transmitting / receiving information to / from each other by wireless communication.

  According to this, since the display device and the thermometer main body are each provided with transmission / reception means and are configured to be able to perform wireless communication with each other, the display device can be installed at a certain distance from the thermometer main body. Since the display device is not wired with the thermometer main body, the thermometer main body can be completely separated from the display device. Therefore, the weight reduction of the thermometer main body is further promoted, and the handleability of the thermometer main body is improved.

The top view which expands and shows the principal part of the arm mounting | wearing type temperature measuring device (temperature measuring device) which concerns on 1st Embodiment. Sectional drawing in the AA 'line of FIG. Sectional drawing which shows the thermometer main body which concerns on 1st Embodiment. The figure which shows the temperature distribution model of the arm mounting | wearing type temperature measuring device which concerns on this embodiment. The block diagram of the periphery of the display control part for displaying temperature, date, etc. in the arm mounting | wearing type temperature measuring device of this example. Sectional drawing which shows the thermometer main body which concerns on 2nd Embodiment. Sectional drawing which expands and shows the principal part of the arm mounting | wearing type temperature measuring device (temperature measuring device) which concerns on the modification 1. FIG. The figure which shows the external temperature sensor which concerns on the modification 2. FIG.

  Hereinafter, an arm-mounted temperature measuring device as a temperature measuring device according to the present embodiment will be described with reference to the drawings.

(First embodiment)
(overall structure)
FIG. 1 is an enlarged plan view showing a main part of the arm-mounted temperature measuring device according to this embodiment, and FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG.

  In FIG. 1, the arm-mounted temperature measuring device 2 of this example includes a device main body 10 as a display device having a substantially square planar shape of 31.5 mm × 29.0 mm, and arm-mounted bands connected to both sides thereof. 12. The apparatus main body 10 has a case 14 made of various materials such as plastic and metal, and the case 14 has a rectangular window for forming the display unit 16 in a region slightly deviated in the 9 o'clock direction of the wristwatch. Is formed. In the case 14, the vertical dimension (the dimension at 12 o'clock to 6 o'clock in the wristwatch) to which the arm mounting band 12 is connected is shorter than the lateral dimension (the dimension at 3 o'clock to 9 o'clock in the wristwatch). ing. For this reason, the arm wearing type temperature measuring device 2 has an improved feeling of wearing on the arm.

  The display unit 16 will be described later in detail with respect to the display contents thereof, and is configured by a liquid crystal display panel 24 having three display areas 18, 20, and 22 as a whole. Since the case 14 is horizontally long, the liquid crystal display panel 24 is a wide-angle panel. The liquid crystal display panel 24 is provided with an EL backlight function.

  The wrist-worn type temperature measuring device 2 has a clock function as well as a normal clock and stopwatch. In the state shown in FIG. 1, the display unit 16 has August 25 in the upper display area 18. And the fact that it is Monday. The lower display area 22 displays that the current time is 10:08:59 am. Here, the display in the lower display area 22 is performed by a large segment similar to a normal stopwatch having a vertical dimension of about 4.7 mm. The middle display area 20 is further divided into two upper and lower stages, and in the lower display area 26, the fact that the temperature is 24.8 ° C. is displayed. Further, in the middle display area 20, the upper display area 28 displays whether or not the current environment is easy to run based on the temperature from rank A to rank E.

(Temperature sensor layout)
In the arm-mounted temperature measuring device 2 of the present embodiment, since the case 14 is horizontally long, a thermometer body 32 covered with a temperature-sensitive cap 30 is arranged on the 3 o'clock side of the wristwatch. As described above, when the horizontally long case 14 is used and the thermometer main body 32 is disposed on the 3 o'clock side, the arm-mounted temperature measuring device 2 is mounted on the arm on the 3 o'clock side. The sleeve of the user's clothes is not covered. Therefore, there is an advantage that highly accurate measurement can be performed.

  In addition, the measurement range of the thermometer main body 32 is −10 ° C. to 50 ° C., and the measurement unit is 0.1 ° C.

  As shown in FIG. 2, the case 14 includes a body portion 34 corresponding to the main body portion and a back cover 36 attached to the back side thereof. The back cover 36 side of the case 14 is a thermometer main body arrangement space. It is 38. Here, the thermometer main body arrangement space 38 is formed inside the case 14. The case 14 is covered with a temperature sensitive cap 30 on the surface side. A hole 42 through which outside air enters and exits is formed in a region corresponding to the thermometer main body arrangement space 38 in the temperature-sensitive cap 30. For this reason, outside air can enter and leave the thermometer main body arrangement space 38 through the hole 42 of the temperature-sensitive cap 30. Therefore, since the thermometer main body 32 is always in contact with new outside air, it quickly responds to the temperature change of the outside air.

  FIG. 3 is a view showing the thermometer main body 32 according to the present embodiment. First, as shown in FIG. 3, the thermometer main body 32 includes a pair of temperature measuring units 58A and 58B. The temperature measurement unit 58 </ b> A includes a heat insulating unit 62 having a contact surface 60 </ b> A that contacts outside air, and a first heat radiation control unit 64 </ b> A provided between the heat insulating unit 62 and the back cover 36. On the other hand, the temperature measuring unit 58B includes a heat insulating unit 62 having a contact surface 60B that contacts outside air at a position different from the contact position of the temperature measuring unit 58A, and a second portion between the heat insulating unit 62 and the back cover 36. A heat dissipation control unit 64B is provided. That is, the heat insulation part 62 is common to the temperature measurement part 58A and the temperature measurement part 58B, and has a common thermal resistance value. The thermometer main body 32 is configured so that different heat distribution controllers 64A and 64B having different thermal conductivities are attached to the lower half of the heat insulating portion 62 so that the temperature distribution differs between the first system 78A and the second system 78B. Has been.

  The temperature measurement unit 58A uses a temperature sensor 66A as a first temperature measurement unit that measures the temperature of the outside air as a first temperature, and the temperature of the interface 68A between the heat insulation unit 62 and the first heat radiation control unit 64A as a first reference temperature. And an intermediate temperature sensor 70A as first reference temperature measuring means (intermediate temperature measuring means) for measuring as the first intermediate temperature.

  Further, the temperature measuring unit 58B refers to the temperature of the temperature sensor 66B as a second temperature measuring unit that measures the temperature of the outside air as the second temperature, and the temperature of the interface 68B between the heat insulating unit 62 and the second heat radiation control unit 64B. An intermediate temperature sensor 70B as second reference temperature measuring means (intermediate temperature measuring means) for measuring as a second intermediate temperature as temperature is provided.

  The first heat radiation control unit 64A of the temperature measurement unit 58A and the second heat radiation control unit 64B of the temperature measurement unit 58B are made of different materials, whereby the thermal resistance value of the first heat radiation control unit 64A and the second heat radiation control are configured. It is set to a value different from the thermal resistance value of the portion 64B.

  As the temperature sensors 66A and 66B and the intermediate temperature sensors 70A and 70B, a sensor that converts the temperature of the outside air and the temperature values of the interfaces 68A and 68B into a resistance value, a sensor that converts the temperature value into a voltage value, and the like can be adopted. For converting the temperature value into the resistance value, a chip thermistor, a flexible substrate on which a thermistor pattern is printed, a platinum resistance thermometer, or the like can be employed. In addition, a thermocouple element, a PN junction element, a diode, or the like can be adopted as a device that converts a temperature value into a voltage value.

  Regarding the thermal conductivity of each part, the temperature difference between the first temperature T1 and the first intermediate temperature T2 and between the second temperature T3 and the second intermediate temperature T4 can be greater than the accuracy (here, 0.1 degree). For example, the heat conductivity of the heat insulating portion 62 is about 0.2 to 0.02 W / m · K, and the heat conductivity of the first heat radiation control portion 64A is 0.2 to 0.00. 02 W / m · K.

  FIG. 4 is a diagram showing a temperature distribution model of the arm-mounted temperature measuring device 2 according to this embodiment. This shows a model of temperature distribution from outside air through the thermometer main body 32 to the back cover 36. The temperature distribution models of the temperature measurement unit 58A and the temperature measurement unit 58B are indicated by a solid line (temperature measurement unit 58A side) and an alternate long and short dash line (temperature measurement unit 58B side). The vertical axis represents temperature (T), and the horizontal axis represents thermal resistance (R). Here, if the relationship between the temperature (T) and the thermal resistance (R) is a straight line, the inclination represents the heat flux Q. Since the temperature distribution models of the temperature measurement unit 58A and the temperature measurement unit 58B behave in the same manner, the following description will focus on the temperature measurement unit 58A side indicated by a solid line.

  As shown in FIG. 4, in the temperature transfer model from the outside air to the back cover 36, the outside air temperature Tout is substantially constant.

  Further, since the temperature measurement unit 58A itself has a thermal resistance (thermal resistance value R) due to the heat insulating unit 62, a temperature drop also occurs in the temperature measurement unit 58A, and the first intermediate temperature is generated at the interface 68A of the temperature measurement unit 58A. T2. The intermediate temperature sensor 70A measures the first intermediate temperature T2. Furthermore, since the first heat radiation control unit 64A having the thermal resistance value Ru1 exists between the interface 68A of the temperature measurement unit 58A and the base material, the temperature decreases and becomes the temperature Tamb of the back cover 36.

  In the steady state, the heat flux Q in each part is constant, so the slope of the graph is constant in FIG. At this time, if the first temperature T1 and the first intermediate temperature T2 of the temperature measurement unit 58A are known, the thermal resistance value R is used to determine the interface from the surface on the temperature sensor 66A side of the temperature measurement unit 58A using the following equation (1). The heat flux Qu1 up to 68A can be calculated.

  On the other hand, using the heat transfer coefficient h between the temperature sensor 66A and the outside air, the heat flux Qu2 from the outside air to the temperature sensor 66A of the temperature measuring unit 58A can be calculated by the following equation (2).

  Since the heat flux Q is constant in each part, the heat flux Qu1 in the thermometer main body 32 and the heat flux Qu2 in the portion from the outside air to the temperature sensor 66A of the temperature measurement unit 58A are equal (Qu1 = Qu2). Therefore, the equations (1) and (2) are arranged as the following equation (3), and the temperature Tout is obtained by this equation (3).

  Since the thermal resistance value Ru1 of the first heat radiation control unit 64A and the thermal resistance value Ru2 of the second heat radiation control unit 64B are set to different values, the thermal resistance (R) between the temperature measurement unit 58A and the temperature measurement unit 58B. The gradient of the temperature (T) with respect to changes (see FIG. 4). That is, two different relational expressions relating to thermal resistance and temperature are obtained. In addition, the structure, surface area, roughness, etc. of the part which contacts the outside air of a temperature sensor are comprised so that the heat transfer coefficient h may become equal.

  From the equations (3) and (4), the temperature Tout is obtained by the following equation (5).

  Therefore, this equation (5) is stored as an arithmetic expression of the temperature Tout in the outside air temperature calculating means as the temperature calculating means.

  The RAM 74 (see FIG. 5) stores the first temperature T1, the second temperature T3, the first intermediate temperature T2, and the second intermediate temperature T4 transmitted from the thermometer main body 32. Further, the outside air temperature Tout calculated by the outside air temperature calculating means is also stored.

  Here, the RAM 74 is configured to be able to store temperature information regarding a plurality of temperature sensors, and stores a temperature Tout and the like. The RAM 74 can store measurement positions such as the first temperature T1 and the second temperature T3 measured when calculating the temperature Tout. In addition to the above-described temperature information, the RAM 74 may store measurement information such as the location of the outside air and the measurement date and time. In this case, the measurement information may be input from buttons 96, 98, 100, 102, and 104.

(Configuration of display control unit)
The configuration of the display control unit will be described with reference to FIG. FIG. 5 is a block diagram around the display control unit for displaying temperature, date and time, etc. in the arm-mounted temperature measuring device of this example.

  In the figure, the display control unit 80 is configured with a CPU 82 as the center, and other circuit units are connected to the CPU 82. The display control unit 80 may be configured as a one-chip microcomputer. The CPU 82 sends control signals to each circuit unit to control them, and processes the sent data. First, the oscillation circuit 84 continues to send a clock signal having a constant frequency, and the frequency dividing circuit 86 divides the signal from the oscillation circuit 84 to a predetermined frequency. The time measuring circuit 88 counts the signal from the frequency dividing circuit 86 to obtain the current time, and outputs it to the CPU 82. The RAM 74 sequentially stores data output from the RAM 74 while being controlled by the CPU 82, and outputs stored data to the CPU 82 based on a command from the CPU 82. The liquid crystal display panel 24 is driven by the display drive circuit 92 and displays data output from the CPU 82. The notification sound generation device 94 generates a notification sound when an operation is performed from the outside or at a predetermined timing.

  Therefore, in the arm-mounted temperature measuring device 2, as shown in FIG. 1, the date can be displayed in the upper display area 18 and the time is displayed in the lower display area 22 in the display unit 16 constituted by the liquid crystal display panel 24. Can be displayed.

  Furthermore, in this example, as shown in FIG. 1, a button 96 is attached to the side surface of the apparatus main body 10, and when the button 96 is pressed, the arm-mounted temperature measuring device 2 is switched to the stopwatch mode. It has become. In addition, buttons 98, 100, 102 are also attached to the side surface of the device body 10 of the arm-mounted temperature measuring device 2. A button 104 is also attached to the surface of the apparatus body 10. Here, when the button 96 is pressed, the stopwatch enters a standby state, and when the button 104 is pressed thereafter, the passage of time starts to be measured. As a result, on the display unit 16, the split time is displayed in the upper display area 18 and the lap time is displayed larger in the lower display area 22. When the button 102 is pressed, the display contents are switched between the upper display area 18 and the lower display area 22, the lap time is displayed in the upper display area 18, and the split time is displayed in the lower display area 22. Is done. Therefore, the user can freely select which of the split time and the lap time is desired to be displayed, so that the split time and the lap time can be clearly confirmed even during running. Further, when the arm-mounted temperature measuring device 2 is used in this mode, the split time, lap time, and outside air temperature are stored in the RAM 74, so that they can be displayed again after the competition is over. is there. The split time in this example is different from the meaning used in a normal marathon or the like, and means the time from starting to passing through a predetermined point. In addition, the lap time in this example is the time required to pass through each section, unlike the meaning used in a normal marathon.

  In FIG. 5 again, the CPU 82 outputs a start signal to the thermometer main body 32, and based on this start signal, the thermometer main body 32 has a resistance value or voltage value that varies with temperature every minute. The result is output to the A / D conversion circuit 106 as an analog signal. The A / D conversion circuit 106 converts the analog signal input from the thermometer main body 32 into a digital signal and outputs the digital signal to the CPU 82. The CPU 82 calculates the outside air temperature Tout based on the first temperature T1 and the second temperature T3 calculated from the resistance value and the voltage value, and the first intermediate temperature T2 and the second intermediate temperature T4. Means. The outside air temperature calculating means calculates the outside air temperature Tout using the first temperature T1, the first intermediate temperature T2, the second temperature T3, and the second intermediate temperature T4. Therefore, the CPU 82 can perform a predetermined calculation on the detection result of the thermometer main body 32 to obtain the temperature displayed on the liquid crystal display panel 24, and can display the obtained temperature on the liquid crystal display panel 24.

  According to the present embodiment, it is possible to provide a temperature measuring device that can measure an outside air temperature that is small and accurate with high accuracy by using sensors having different thermal resistances.

(Second Embodiment)
FIG. 6 is a view showing the thermometer main body 44 according to the present embodiment. First, as shown in FIG. 6, the thermometer main body 44 includes a pair of temperature measuring units 58A and 58B. The temperature measuring unit 58A includes a heat insulating unit 62 having a contact surface 60A that comes into contact with outside air. On the other hand, the temperature measuring unit 58B includes a heat insulating unit 62 having a contact surface 60B that contacts outside air at a position different from the contact position of the temperature measuring unit 58A, and a second portion between the heat insulating unit 62 and the back cover 36. A heat dissipation control unit 64B is provided. That is, the heat insulation part 62 is common to the temperature measurement part 58A and the temperature measurement part 58B, and has a common thermal resistance value. The thermometer main body 44 has a temperature distribution between the first system 78A and the second system 78B by attaching another second heat radiation control unit 64B having a different thermal conductivity to the lower half of the heat insulation unit 62 of the temperature measurement unit 58B. Are configured differently.

(Modification 1)
FIG. 7 is an enlarged cross-sectional view showing the main part of the arm-mounted temperature measuring device 4 according to this modification. About the arrangement | positioning relationship between the thermometer main body 32 and the case 14, the thermometer main body 32 peripheral part (temperature measurement part 58A, 58B) is arrange | positioned in the state which contact | connects external air. For example, as shown in FIG. 7, the thermometer main body 32 may be exposed on the surface portion of the case 14.

(Modification 2)
FIG. 8 is a view showing an outside air temperature sensor according to this modification. In the above embodiment, a wristwatch type is described as an example, but it can be used for an application where it is installed on an object that produces heat and the outside air temperature is to be measured accurately. For example, by using it as an outside temperature meter of an automobile, it is possible to eliminate the possibility that the outside temperature cannot be measured accurately due to the influence of the engine. Further, as shown in FIG. 8, by attaching an apparatus main body 46 having a thermometer main body 32 (44) to a pipe 48 and using it as an outside air temperature meter of the boiler, the outside air temperature can be accurately measured by the heat of the boiler itself. The fear of not being able to be eliminated.

(Modification 3)
The thermometer main body 32 and the display control unit 80 may be configured separately and configured to be communicable by a transmission / reception means. The number of parts mounted on a portable or permanent thermometer body can be minimized, and the weight and size of the thermometer body can be reduced. Therefore, even if the thermometer main body is worn for a long time, it does not become a burden, and the portability of the thermometer main body can be improved.

  In addition, since the transmission / reception means performs wireless communication using the antenna coil, the wiring and the like do not get in the way, and the handleability of the arm-mounted temperature measuring device can be improved.

  Furthermore, an electromotive force can be generated in the antenna coil of the thermometer main body by electromagnetic induction by transmitting radio waves from the antenna coil of the display control unit. Since the thermometer main body can be driven by this electromotive force, the thermometer main body does not need a power source such as a battery, and the thermometer main body can be further reduced in weight and size.

  Furthermore, since the storage unit can store information such as temperature Tout for a plurality of outside air, the thermometer main body can be used alternately at a plurality of locations, and the convenience of the thermometer main body can be improved. As a result, even when the thermometer main body is used at a plurality of locations, the previous temperature Tout of the target location to be measured can be read out from the storage unit, which is suitable for monitoring temperature over a long period of time.

  Further, the display control unit 80 may be configured to manage information of the plurality of thermometer main bodies 32. In this case, an ID code or the like that can identify each thermometer body 32 may be provided so that the display controller 80 can recognize and manage the thermometer body 32.

  Further, information on a plurality of electronic thermometers may be managed by sending information on the electronic thermometer to a terminal or the like. In this case, since temperature data and the like for each time can be stored and managed in the terminal, operability is improved. In such a configuration, even when the electronic thermometer to be used is changed, previously calculated temperature data and the like can be acquired from the terminal, so that the convenience of the electronic thermometer can be improved.

  The measuring means and the reference temperature measuring means are not limited to being provided two by two, and a plurality of three or more may be provided.

  The shape of the display body is not limited to a wristwatch, and may be, for example, a stationary or other pendant type.

  DESCRIPTION OF SYMBOLS 2,4 ... Arm mounting type temperature measuring device (temperature measuring device) 10 ... Device main body 12 ... Arm mounting band 14 ... Case 16 ... Display unit 18, 20, 22 ... Display area 24 ... Liquid crystal display panel 26, 28 ... Display Area 30 ... Temperature sensing cap 32 ... Thermometer body 34 ... Body part 36 ... Back cover 38 ... Thermometer body arrangement space 42 ... Hole 44 ... Thermometer body 46 ... Device body 48 ... Piping 58A, 58B ... Temperature measuring section 60A, 60B ... Contact surface 62 ... Heat insulation part 64A ... First heat radiation control part 64B ... Second heat radiation control part 66A ... Temperature sensor (first temperature measurement means) 66B ... Temperature sensor (second temperature measurement means) 68A, 68B ... Interface 70A ... Intermediate temperature sensor (intermediate temperature measurement means, first reference temperature measurement means) 70B ... Intermediate temperature sensor (intermediate temperature measurement means, second reference temperature measurement means) 74 ... RAM 78A ... first system 78B ... second system 80 ... display control unit 82 ... CPU 84 ... oscillation circuit 86 ... frequency divider circuit 88 ... timer circuit 92 ... display drive circuit 94 ... notification sound generator 96, 98, 100 , 102, 104 ... button 106 ... A / D conversion circuit.

Claims (5)

First temperature measuring means for measuring a first temperature of outside air;
First reference temperature measurement for measuring a temperature at a position having a predetermined thermal resistance value between the first temperature measurement position and the first thermal resistance value between the first temperature and the substrate as a first reference temperature. Means,
A second temperature measuring means for measuring a second temperature at an outside air position different from the measurement position of the first temperature;
A temperature at a position having the predetermined thermal resistance value between the second temperature measurement position and a second thermal resistance value different from the first thermal resistance value between the second temperature and the base material is set to a second temperature. A second reference temperature measuring means for measuring as a reference temperature;
Temperature calculating means for calculating the temperature of the outside air using the first temperature, the first reference temperature, the second temperature, and the second reference temperature;
A temperature measuring device comprising: In the temperature measuring device according to claim 1,
The predetermined predetermined thermal resistance between the measurement position of the first temperature and the measurement position of the first reference temperature and between the measurement position of the second temperature and the measurement position of the second reference temperature. A heat insulating part having a value is provided,
Between the measurement position of the first reference temperature and the base material, a first heat dissipation control unit having the first thermal resistance value is provided,
A temperature measurement device, wherein a second heat radiation control unit having the second thermal resistance value is provided between the measurement position of the second reference temperature and the base material. In the temperature measuring device according to claim 1 or 2,
A display device having a display unit for displaying the temperature of the outside air calculated by the temperature calculating means;
A thermometer body having the first temperature measuring means and the second temperature measuring means;
Including
The temperature measuring device, wherein the display device and the thermometer main body are configured separately. In the temperature measuring device according to claim 3,
The temperature measuring device, wherein the temperature calculation means is provided in the display device. In the temperature measuring device according to claim 3 or 4,
The temperature measuring device, wherein the display device and the thermometer main body each include transmitting / receiving means capable of transmitting / receiving information to / from each other by wireless communication.