JP6957398B2 - Body temperature measuring device - Google Patents

Description

The present invention relates to a body temperature measuring device for specifying a body temperature by being worn on a body and measuring a skin temperature and an external temperature.

In recent years, there is an increasing need to measure body temperature for a long period of time such as while sleeping, exercising, or working for the purpose of health management. In order to measure body temperature, it is common to measure it in the mouth or under the armpit, but it is difficult to measure body temperature for a long time at these positions. As a method of measuring body temperature for a long time, a method of measuring body surface temperature (skin temperature) by attaching a device to the body is known, but since body surface temperature is easily affected by outside air temperature, outside air temperature It is necessary to correct the body surface temperature and calculate the body temperature. Therefore, it is desired that not only the body surface temperature but also the outside air temperature is not affected by clothing and the like, and the variation is minimized.

Conventionally, a body temperature measuring device for knowing a body temperature is known, for example, in Patent Documents 1 to 3. In Patent Document 1, as a wearable sensor device, a body surface temperature detection unit is provided on the surface of the inside of the casing that is on the body surface side, and an outside air temperature detection unit is provided on the opposite surface. It is described that the temperature is measured by conducting heat conduction to the temperature measuring element of the body surface temperature detecting unit, and the outside air temperature is detected by the outside air temperature detecting unit via the casing.

Further, in Patent Document 2, as a wearable temperature measuring device, a body surface temperature detecting unit is provided on the surface of the casing on the body surface side so as to be exposed on the same surface as the casing, and is on the side opposite to the body surface. Therefore, it is described as a configuration provided on the back surface side of the display portion inside the casing.

Further, in Patent Document 3, as a body temperature information terminal device, a body surface temperature detection unit is provided on the surface of the casing on the body surface side so as to project from the casing, and an outside air temperature detection unit is provided on the opposite surface from the casing. It is described as a protruding configuration.

Japanese Patent No. 6163637 Japanese Unexamined Patent Publication No. 2008-128781 Japanese Patent No. 3909301

By the way, the above-mentioned device for measuring the body surface temperature and the outside air temperature calculates the body temperature by various methods based on the measured temperatures, and the measured temperature is the data to be calculated. Is the data after entering the stable period when the original body surface temperature is reached, and it is necessary to shorten the time until then and minimize the variation in temperature measurement. It takes time to reach a stable period, and it is hard to say that the structure copes with variations in the measured temperature. In particular, since the outside air temperature detection unit provided on the same surface as or protruding from the casing is mounted in contact with clothing such as underwear, it is said that accurate temperature measurement cannot be performed due to frictional heat with clothing. There's a problem.

Therefore, the present invention has been made in view of the above problems, and provides a body temperature measuring device having a structure that reduces the variation in the measured temperature by shortening the time until the stable period of the measured temperature data for which the body temperature is calculated. With the goal.

In order to solve the above problem, the invention of claim 1 is a body temperature measuring device that is worn on the body, measures the skin temperature and the external temperature for specifying the body temperature, and stores at least the elapsed time and the measured temperature data. The tip of the housing to be worn on the body and the surface of the skin-side housing on the body side when worn on the body are exposed at a predetermined height and come into contact with the skin of the body. The tip of the skin temperature sensor that measures the temperature and the external temperature sensor hole formed on the surface of the housing other than the skin-side housing surface is positioned so as to be exposed in the middle of the thickness of the housing on the inner side of the housing. An external temperature sensor that measures the external temperature by providing a gap region between the position of the surface of the housing and the tip portion thereof is provided.

According to the present invention, the skin temperature and the external temperature are measured when the skin temperature sensor is attached to the body to specify the body temperature, and the tip portion of the skin temperature sensor when the skin temperature sensor is attached to the body is the skin on the body side. By exposing it at a predetermined height from the surface of the side housing, it is brought into contact with the skin to measure the skin temperature, and the external temperature sensor is provided from the hole for the external temperature sensor formed on the surface of the housing other than the surface of the skin side housing. A configuration in which the tip portion is positioned in an exposed state in the middle of the thickness of the housing on the inner side of the housing, and the external temperature is measured with a gap region formed between the position of the housing surface and the tip portion. By doing so, it is possible to shorten the time until the stable period of the measured temperature data for which the body temperature is calculated by the exposed structure of the skin temperature sensor and the external temperature sensor, and the tip portion of the skin temperature sensor is set to the predetermined height. At the same time, by providing a gap region between the external temperature sensor and the tip portion exposed as the inner side of the housing, the variation in the measured temperature can be reduced and the entry of foreign matter such as dust can be reduced. Is.

It is a block diagram of the body temperature measuring apparatus which concerns on this invention. It is explanatory drawing of the skin temperature measurement sensor and the external temperature sensor of the body temperature measuring apparatus of FIG. It is explanatory drawing of the wearing state of the body temperature measuring apparatus of FIG. It is explanatory drawing of the temperature measurement according to the height position of the skin temperature sensor in the body temperature measuring apparatus. It is explanatory drawing of the comparative example of the skin temperature measured by the skin temperature sensor in direct contact with the skin, and the skin temperature measured by the skin temperature sensor through the housing with respect to the skin. It is explanatory drawing of the influence on the external temperature in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration diagram of the body temperature measuring device according to the present invention, and FIG. 2 shows an explanatory diagram of a skin temperature measuring sensor and an external temperature sensor of the body temperature measuring device of FIG. In FIGS. 1A and 1B, the body temperature measuring device 11 is to be worn on the body, and one side of the housing 12 is a skin-side housing surface 13 that comes into direct contact with the skin, and the other side is a skin-side housing surface 13. The outer housing surface 14 is used. The outer housing surface 14 is in contact with clothing such as underwear when worn.

The housing 12 is made of a resin such as acrylonitrile-butadiene-styrene (ABS), silicon, polypropylene (PP), polyester (PE), etc., having a thickness d of, for example, about 1.5 mm (see FIG. 2). An electron in which a skin temperature sensor 21 is mounted on one side and an external temperature sensor 22 is mounted on the other side, and a processing circuit having at least a time measuring means and a storage means for storing measured temperature data for each elapsed time is mounted. An electronic circuit unit 31 including a circuit board 31A is provided. The housing 12 is not limited to the thickness and the type of resin, and is appropriately selected in consideration of usability, durability, and the like. The present invention relates to the structure of the skin temperature sensor 21 and the external temperature sensor 22 with respect to the housing 12, and the details of the processing circuit will be omitted.

The tip of the skin temperature sensor 21 is expressed at a predetermined height from the skin temperature sensor hole 15 formed at the corresponding position of the skin side housing surface 13 in the housing 12. Specifically, as shown in FIG. 2A, the tip portion of the skin temperature sensor 21 having a diameter of φ (for example, φ> 1 mm, preferably φ ≧ 2 mm) has a predetermined height above the surface of the skin-side housing surface 13. It is provided in a state where the temperature is h1 (h1 ≧ 0 mm), preferably 0.2 ≦ h1 <9 mm, and more preferably 2 ≦ h1 <7 mm. When 0.2 ≦ h1, the measurement temperature is stable (see FIG. 4), and when h1 <9, the pain on the skin is reduced. Actually, h1 = 2 mm. The predetermined height is used in the concept including "0" in the present invention. The measured temperature at each height of the predetermined height h1 will be described with reference to FIG.

The external temperature sensor 22 is located so that the tip portion thereof is exposed on the inner side of the housing 12 from the hole 16 for the external temperature sensor formed at the corresponding position of the outer side housing surface 14 in the housing 12. A gap region 22A is provided between the position of the side housing surface 14 and the tip portion thereof. Other forms of arrangement of the external temperature sensor 22 in the housing 12 will be described later.

Specifically, as shown in FIG. 2B, the tip portion of the external temperature sensor 22 having a diameter of φ (for example, φ> 1 mm) is a predetermined distance h2 from the surface of the outer housing surface 14 to the inner side of the housing. (H2> 0 mm), preferably provided in a state where the housing 12 is exposed and positioned with a thickness d> h2> 0.2 mm, whereby the surface of the outer housing surface 14 and the external temperature sensor are provided. A gap region 22A is formed between the tip portion and the tip portion of the 22. If h2> 0.2, there is little contact with clothing fibers and the like, and if the thickness of the housing is d> h2, foreign matter such as dust can be reduced from entering the housing 12. Actually, h2 = 0.5 mm. In addition, in FIG. 2B, the tip end portion of the external temperature sensor 22 is shown as being positioned in the middle of the thickness of the housing 12, but it may be positioned inside the housing 12, and in that case, Treatment such as sealing may be performed to prevent foreign matter and water from entering.

The skin temperature sensor 21 and the external temperature sensor 22 may have the same structure or different structures, and when they have the same structure, as shown in FIG. 2C, the diameter φ (for example, φ> 1 mm). , Preferably φ ≧ 2 mm), a cylindrical shape with a stainless steel tip having a thickness of d1 (for example, d1 = 0.1 mm) in which the tip is closed, and a temperature measuring element 23 such as a thermistor contacts the tip of the inner tip. It is formed by being fixed with, for example, a fixing resin 24. This is in consideration of the fact that when the diameter is φ <1, the skin may feel pain. Further, the diameter φ may be the same or different in diameter for the skin temperature sensor 21 and the external temperature sensor 22, but for the corresponding skin temperature sensor hole 15 and the external temperature sensor in the housing 12, respectively. It is preferable that the hole 16 is substantially the same as the hole 16, whereby the gap can be reduced and the waterproof performance can be improved. The material of the skin temperature sensor 21 and the external temperature sensor 22 is not made of stainless steel, but a metal such as aluminum or copper can also be used. Further, the thickness d1 may be arbitrarily determined from the thermal conductivity and the strength by utilizing the characteristics of the metal to be used.

Therefore, FIG. 3 shows an explanatory diagram of the wearing state of the body temperature measuring device of FIG. 1, and FIG. 4 shows an explanatory diagram of temperature measurement according to the height position of the skin temperature sensor in the body temperature measuring device. In FIG. 3, the body temperature measuring device 11 is worn between the body, for example, the skin 41 and clothing 42 such as underwear. In this case, the skin-side housing surface 13 of the body temperature measuring device 11 comes into direct contact with the skin 41, and the tip portion of the skin temperature sensor 21 protruding at a predetermined height comes into direct contact with the skin 41 in a slightly recessed state. ..

Further, although the outer housing surface 14 of the body temperature measuring device 11 comes into contact with the clothing 42, the exposed tip portion of the external temperature sensor 22 does not directly contact the clothing 42, and the tip portion and the clothing 42 are not in direct contact with the clothing 42. The gap region 22A is interposed between the two. That is, since the external temperature sensor 22 does not come into direct contact with the clothing 42 due to the gap region 22A, the temperature is measured without being affected by the frictional heat with the clothing 42.

The measured temperature of the skin temperature sensor 21 when the height of the tip portion thereof is changed is shown in FIG. 4 (A). The temperature measurement in this case is shown as a case where the temperature is measured at 15-minute intervals for 3 hours. That is, "0.2 mm" and "2 mm" are taken as reference objects (Ref) when the height of the tip portion of the skin temperature sensor 21 is "-1 mm" (inside the housing of the skin side housing surface 13). , "3 mm", "5 mm", and "7 mm", the average value, maximum value (MAX), and minimum value (MAX) of the skin (body surface) temperature (° C.) after 30 minutes and 60 minutes after wearing, respectively. MIN), the temperature difference between the maximum and minimum values, and the standard deviation (σ) are shown. When the height is 9 mm or more, the temperature is not measured because the measurer feels pain.

From each numerical value in FIG. 4A, if the height of the tip of the skin temperature sensor 21 from the skin-side housing surface 13 is 0 mm or more as compared with the reference object (Ref), the standard deviation after 60 minutes. As shown in FIG. 4 (B), the variation of is 0.2 or less, and the variation can be minimized, and the temperature difference between the maximum value and the minimum value after 60 minutes is shown in FIG. 4 (B). As shown in C), the temperature can be set to 1 ° C. or lower. It was confirmed that the skin temperature sensor 21 was equivalent even if the thickness d1 and the tip shape shown in FIG. 2C were different.

Subsequently, FIG. 5 shows an explanatory diagram of a comparative example of the skin temperature measured by the skin temperature sensor in direct contact with the skin and the skin temperature measured by the skin temperature sensor through the housing with respect to the skin, and FIG. 5 shows an explanatory diagram of the influence on the external temperature in FIG. In FIG. 5, the temperature measurement is 36 when the exposed tip portion of the skin temperature sensor 21 is in direct contact with the skin to measure the skin temperature and when the skin temperature is measured through the housing provided on the inner wall of the housing. The time when the temperature rises above ° C., the time when the variation in the standard deviation becomes 0.2 or less, and the standard deviation value are shown. FIG. It shows the time when the temperature measurement by the external temperature sensor 22 is 35 ° C. or higher, the time when the variation of the standard deviation is 0.2 or less, and the standard deviation value when the temperature is measured in the case where the temperature is 35 ° C. or higher. The housing is made of ABS resin having a thickness of 1 mm.

The skin temperature sensor 21 is stable by exposing the tip portion as shown in FIGS. 5A and 5B when the tip portion is exposed and when the skin temperature sensor 21 is exposed through the housing. It was confirmed that the time required for the measurement was extremely short, and the time until the stable period of the measured temperature data for which the body temperature was calculated was shortened, and also shown in FIGS. 5 (A) and 5 (C). As described above, it was confirmed that the variation of the standard deviation after 30 minutes and after 60 minutes was small by exposing the tip portion.

Further, in the temperature measurement by the external temperature sensor 22 at this time, as shown in FIGS. 6A and 6B, the time until the external temperature stabilizes when the tip portion of the skin temperature sensor 21 is exposed. Is extremely short, and it is confirmed that the time until the stable period of the measured temperature data for which the body temperature is calculated is shortened, and as shown in FIGS. 6 (A) and 6 (C), the skin. By exposing the tip portion of the temperature sensor 21, it was confirmed that the variation in the standard deviation of the external temperature after 30 minutes and after 60 minutes was small.

In this way, the skin temperature sensor 21 is exposed at a predetermined height from the skin side housing surface 13 at the tip portion, and the external temperature sensor 22 is positioned at the more tip portion inside the housing side to be positioned on the outer housing surface. By providing a gap region 22A between the position 14 and the tip portion to express the structure, it is possible to shorten the time until the stable period of the measurement temperature data for which the body temperature is calculated, and the measurement temperature. It is possible to reduce the variation of.

By the way, the skin temperature sensor 21 may be supported by an elastic member such as a spring. By making the skin temperature sensor 21 move up and down in a range of preferably 10 mm> h1> 0.1 mm, more preferably 3 mm> h1> 0.5 mm with respect to the skin side housing surface 13, the device itself can be made of skin. The skin temperature sensor 21 can always be in contact with the skin 41 even when the skin temperature sensor 21 is separated from or approaches the skin 41, and the temperature can be measured more accurately than when the skin temperature sensor 21 is separated from the skin 41.

In the above embodiment, the housing is shown as a substantially rectangular parallelepiped shape, but the shape of the housing such as a cone or an ellipsoid is not limited to this. In this case, it is preferable that the skin has a predetermined contact surface so that the pressure on the skin is not concentrated and there is no pain when the skin is worn, and the shape is flat and stable.

Further, the external temperature sensor 22 may be located at a position where it does not come into contact with the skin when the housing is attached to the body. That is, it may be located at a place other than the planned contact surface of the housing at the time of wearing, and more preferably, it is provided on the opposite side of the skin temperature sensor which is not easily affected by the radiation of body temperature as in the above embodiment.

The body temperature measuring device of the present invention can be used in industrial fields such as manufacturing, sales, and use of a device for specifying body temperature by being worn on the body and measuring skin temperature and external temperature.

11 Body temperature measuring device 12 Housing 13 Skin side housing surface 14 External housing surface 15 Skin temperature sensor hole 16 External temperature sensor hole 21 Skin temperature sensor 22 External temperature sensor 22A Void area 23 Temperature measuring element 24 Fixing resin 31 Electronic circuit section 31A Electronic circuit board 41 Skin 42 Clothing

Claims (1)

A body temperature measuring device that is worn on the body, measures skin temperature and external temperature for specifying body temperature, and stores at least elapsed time and measured temperature data.
The housing to be worn on the body and
A skin temperature sensor that measures the skin temperature by contacting the skin of the body with the tip portion exposed at a predetermined height from the surface of the skin-side housing that is the body side when worn on the body.
The tip of the external temperature sensor hole formed on the surface of the housing other than the surface of the housing on the skin side is exposed and positioned in the middle of the thickness of the housing on the inside of the housing, and the position is from the position of the surface of the housing. An external temperature sensor that measures the external temperature by providing a gap region between the tip and the tip
A body temperature measuring device characterized by having.

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