JPH11188008A - Ear drum thermometer - Google Patents
Ear drum thermometerInfo
- Publication number
- JPH11188008A JPH11188008A JP9357931A JP35793197A JPH11188008A JP H11188008 A JPH11188008 A JP H11188008A JP 9357931 A JP9357931 A JP 9357931A JP 35793197 A JP35793197 A JP 35793197A JP H11188008 A JPH11188008 A JP H11188008A
- Authority
- JP
- Japan
- Prior art keywords
- thermometer
- eardrum
- infrared light
- focus
- ear drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000003454 tympanic membrane Anatomy 0.000 title claims abstract description 40
- 210000000613 ear canal Anatomy 0.000 description 19
- 239000013307 optical fiber Substances 0.000 description 13
- 230000003287 optical effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000036760 body temperature Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 210000003027 ear inner Anatomy 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036757 core body temperature Effects 0.000 description 1
- 210000000624 ear auricle Anatomy 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 208000022760 infectious otitis media Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Radiation Pyrometers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、近距離の小さい面
の温度を計測する温度計、特に一般家庭向け鼓膜体温計
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermometer for measuring the temperature of a small surface at a short distance, and particularly to an eardrum thermometer for general households.
【０００２】[0002]
【従来の技術】人間の耳たぶ（耳殻）をつかみ後上方に
引き、耳の穴（外耳道）を覗くと奥に真珠色をした鼓膜
が観察される。耳の穴の入り口（外耳道入口部）から鼓
膜まで（外耳道）成人で約３．５センチあり、鼓膜より
内側は内耳腔でさらに奥に内耳がある。外耳道はほぼへ
の字形に曲がっていて、耳殻を後上方に引き上げると、
ほぼ一直線になって鼓膜を観察する事が出来る。鼓膜は
卵円形に近く長径は９ミリあまりで、厚さは薄いところ
で０．１ミリ程度でやや透明で鼓室の中のものまでかす
かに見ることが出来る。2. Description of the Related Art When a human earlobe (ear shell) is grasped and pulled upward, and a person looks into an ear hole (external ear canal), a pearly eardrum is observed at the back. From the entrance of the ear hole (the entrance of the external auditory canal) to the eardrum (the external auditory canal), it is about 3.5 cm for adults, and the inner ear cavity is located further inside the eardrum in the inner ear cavity. The ear canal is bent in an almost U-shape.
The eardrum can be observed almost straight. The eardrum is nearly oval and has a major axis of about 9 mm. The thickness is about 0.1 mm where the thickness is thin, and it is slightly transparent and can be seen faintly to the inside of the eardrum.
【０００３】体に異常があり発熱時には、内耳の器管も
熱を持ちその局所から赤外光を薄い鼓膜を通して放射す
る。特に急性中耳炎のときは、熱は３８度前後が普通で
あるが、幼少児では４０度かそれ以上になることがあ
る。At the time of heat generation due to abnormalities in the body, the organ of the inner ear also has heat and radiates infrared light from a local portion through a thin eardrum. Especially in acute otitis media, the fever is usually around 38 degrees, but may be 40 degrees or more in young children.
【０００４】この場合、鼓膜から体温を測定するための
一般家庭向けの廉価な鼓膜体温計として図２に示すもの
がある。体温計の筐体５の内部に焦電型赤外線検出器２
と、内部または分離した外部に、その検出した信号を温
度に変換する電子回路と表示器（図示せず）を備え、筐
体５に固定された筒３の内側に導光管１３を設け、その
導光管１３の一端は焦電型赤外線検出器２の検出面に導
かれている。In this case, there is an inexpensive eardrum thermometer for general households for measuring body temperature from the eardrum as shown in FIG. Pyroelectric infrared detector 2 inside thermometer housing 5
And an electronic circuit and a display (not shown) for converting the detected signal into a temperature inside or separately outside, and a light guide tube 13 provided inside the cylinder 3 fixed to the housing 5. One end of the light guide tube 13 is guided to a detection surface of the pyroelectric infrared detector 2.
【０００５】体温測定時には、耳殻１２を軽く後上方に
引張って鼓膜体温計を片手で持ち、筒３の先端部を耳道
入口部１１に軽く挿入して、温度の一番高いところをサ
ーチする。この時、鼓膜９を含めた外耳道１０からの赤
外光８は筒３の先端の導光管１３の入力面に入り、導光
管１３の管内で直接または反射を繰り返し、焦電型赤外
線検出器２の検出面に入る。そして、その信号は電子回
路で温度値に変換されて表示器に表示される。At the time of measuring the body temperature, the ear shell 12 is lightly pulled upward and backward, the eardrum thermometer is held with one hand, the tip of the tube 3 is lightly inserted into the ear canal entrance 11, and the highest temperature is searched. . At this time, the infrared light 8 from the external auditory canal 10 including the eardrum 9 enters the input surface of the light guide tube 13 at the tip of the tube 3 and repeats directly or repeatedly in the light guide tube 13 to detect the pyroelectric infrared light. It enters the detection surface of the vessel 2. Then, the signal is converted into a temperature value by an electronic circuit and displayed on a display.
【０００６】また、手術時に使用する体温モニター用の
高級機では、図３に示すように赤外光を良く通す光ファ
イバー１５を備え、体温計の筐体５内にレンズ１４と焦
電型赤外線検出器２と、内部または分離した外部に検出
信号を温度値に変換する電子回路と表示器（図示せず）
を設けている。A high-grade body temperature monitor used during surgery is provided with an optical fiber 15 that allows infrared light to pass through well as shown in FIG. 3, and a lens 14 and a pyroelectric infrared detector are provided in a housing 5 of the thermometer. 2, an electronic circuit and a display (not shown) for converting a detection signal into a temperature value inside or in a separate outside.
Is provided.
【０００７】この体温計では、光ファイバー１５を耳道
入口部１１からやさしく内部に挿入し、徐々に注意深く
鼓膜に近づける。そして光ファイバー１５を被検者の体
に固定する。鼓膜９の近傍で光ファイバー１５の先端部
が鼓膜９からの赤外光８を捉え、赤外光８は光ファイバ
ー１５で導光されて筐体５内の他端から発光し、レンズ
１４で集光され焦電型赤外線検出器２の検出面に入射す
る。そして、その信号は電子回路で温度値に変換されて
表示器に表示される。In this thermometer, the optical fiber 15 is gently inserted into the ear canal entrance 11 and gradually and carefully approached to the eardrum. Then, the optical fiber 15 is fixed to the body of the subject. In the vicinity of the eardrum 9, the tip of the optical fiber 15 catches the infrared light 8 from the eardrum 9, the infrared light 8 is guided by the optical fiber 15, emitted from the other end in the housing 5, and condensed by the lens 14. Then, the light enters the detection surface of the pyroelectric infrared detector 2. Then, the signal is converted into a temperature value by an electronic circuit and displayed on a display.
【０００８】[0008]
【発明が解決しようとする課題】従来の鼓膜体温計は以
上のように構成されているが、図２に示す導光管１３を
使用した方式では、導光管１３に入る赤外光８に対して
開口数（ＮＡ）が非常に大きいため、外耳道１０の鼓膜
９以外の部分からの赤外光８も導光管１３に入るので、
真の深部体温を測定できないという問題があった。The conventional eardrum thermometer is constructed as described above. However, in the system using the light guide tube 13 shown in FIG. Since the numerical aperture (NA) is very large, infrared light 8 from a portion other than the eardrum 9 of the external auditory canal 10 also enters the light guide tube 13.
There was a problem that true core body temperature could not be measured.
【０００９】また、図３に示す光ファイバー１５を使用
した方式では、赤外光８の透過率の高い光ファイバー１
５は高価であり、さらに焦電型赤外線検出器２の検出面
に赤外光８を集束するために、レンズ１４を使用するこ
とになり、光学系を設けるためコストがかかり、また、
光ファイバー１５の光伝送損失も比較的大きい。更に外
耳道の奥深くに、光ファイバー１５を挿入し、鼓膜９に
近接して位置決めすることは難しく危険であり、不快感
を伴なうという問題があった。In the system using the optical fiber 15 shown in FIG. 3, the optical fiber 1 having a high transmittance of the infrared light 8 is used.
5 is expensive, and furthermore, a lens 14 is used to focus the infrared light 8 on the detection surface of the pyroelectric infrared detector 2, and the cost is increased because an optical system is provided.
The optical transmission loss of the optical fiber 15 is also relatively large. Furthermore, it is difficult and dangerous to insert the optical fiber 15 deep into the ear canal and position the optical fiber 15 in the vicinity of the eardrum 9, and there is a problem that it causes discomfort.
【００１０】本発明は、このような事情に鑑みてなされ
たものであって、構造が簡単で外耳道１０の奥深くの鼓
膜９からの赤外光８のみを捉えることのできる安価で精
度の高い鼓膜体温計を提供することを目的とする。The present invention has been made in view of such circumstances, and is inexpensive and highly accurate with a simple structure and capable of capturing only infrared light 8 from the eardrum 9 deep in the ear canal 10. The aim is to provide a thermometer.
【００１１】[0011]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の鼓膜体温計は、先端に開口部を有する中空
円錐状の筒と、それを固定している筐体内に開口数の小
さい凹面状の楕円反射鏡を備え、その楕円の焦点位置に
赤外線検出器を設け、前記筒の開口部の先端から外に筒
長手方向に楕円の他方の焦点位置がくるように、楕円反
射鏡、赤外線検出器および筒の開口部を光学的に配置す
ることにより、筒の開口部から入射する赤外光を赤外線
検出器で捉えて温度を検出することができるようにした
ことを特徴とする。In order to achieve the above-mentioned object, an eardrum thermometer according to the present invention comprises a hollow conical tube having an opening at its tip and a small-numerical-aperture inside a housing to which it is fixed. Providing a concave elliptical reflecting mirror, providing an infrared detector at the focal position of the ellipse, so that the other focal position of the ellipse comes out of the tip of the opening of the cylinder in the longitudinal direction of the cylinder, By optically arranging the infrared detector and the opening of the cylinder, the infrared light incident from the opening of the cylinder can be detected by the infrared detector to detect the temperature.
【００１２】本発明の鼓膜体温計は上記のように構成さ
れており、楕円凹面反射鏡を使用することで、その焦点
を通る赤外光をもう一つの焦点で検出することができ、
簡単な構造で安全で精度のある体温測定をすることがで
きる。The eardrum thermometer of the present invention is configured as described above. By using an elliptical concave reflecting mirror, infrared light passing through the focal point can be detected at another focal point.
A simple structure enables safe and accurate measurement of body temperature.
【００１３】[0013]
【発明の実施の形態】本発明の鼓膜体温計の一実施例を
図１により説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an eardrum thermometer according to the present invention will be described with reference to FIG.
【００１４】図１において、体温計の筐体５の内部に凹
面状の楕円反射鏡１を備え、その楕円のＦ１焦点６に焦
電型赤外線検出器２を設け、もう一つのＦ２焦点７が外
耳道１０に挿入する筒３の先端方向に位置するように、
楕円反射鏡１と、焦電型赤外線検出器２と筒３とを光学
的に配置した構造を有している。楕円体においてその焦
点から出た光は楕円体面で反射して、もう一つの焦点に
入る。この原理を利用した構造を有した体温計である。In FIG. 1, a concave elliptical reflecting mirror 1 is provided inside a housing 5 of a thermometer, a pyroelectric infrared detector 2 is provided at an F1 focal point 6 of the ellipse, and another F2 focal point 7 is located at an ear canal. 10 so that it is located in the direction of the tip of the cylinder 3 to be inserted.
It has a structure in which an elliptical reflecting mirror 1, a pyroelectric infrared detector 2, and a tube 3 are optically arranged. In the ellipsoid, light that comes out of its focal point reflects off the ellipsoidal plane and enters another focal point. This is a thermometer having a structure utilizing this principle.
【００１５】楕円反射鏡１は楕円軌道の一部を使用し、
そのため開口数（ＮＡ）の小さい、収差の少ない光学系
であり、凹面鏡として樹脂成型でつくられ、表面に金属
反射膜をコートしている。そして、楕円反射鏡１で反射
した赤外光８を検出するために小型で感度の良い焦電型
赤外検出器２を使用している。筐体５内部または分離し
た外部に、上記の他に焦電型赤外線検出器２からの信号
を温度値に変換する電子回路部と、その値を表示する表
示器が設けられている（図示せず）。筒３は耳道入口部
１１から外耳道に滑らかに挿入できるような円錐型を有
した熱伝導率の低い樹脂で成型されており、皮膚に接触
しても冷たさを感じない材料でできている。その筒は筐
体５に固定され、外耳道１０の奥深い鼓膜９からの赤外
光８のＦ２焦点７を通過したものだけが細いビームとし
て筒３の内部を通ることになる。この体温計を実際に使
用するときは、まず体温計の筐体５を持ち、筒３の円錐
部分を耳道入口部１１に軽く挿入し、外耳道１０内に押
し入れる。方向を調整しつつ赤外光量のピークをサーチ
する。そのピーク位置では、鼓膜９からの赤外光８のＦ
２焦点を通ったものだけが、筒３に入り楕円反射鏡１で
反射して焦電型赤外線検出器２に入る。したがって、外
耳道１０からの目的外の赤外光８は筒３を通って楕円反
射鏡１に入ることがないので、信頼性の良い精度の高い
温度を測定することができる。このように楕円反射鏡１
を使用しているので、開口数の小さな、収差の無い光学
系が構成されており、細い赤外ビームで耳の奥深い鼓膜
９部分の温度を容易に測定することができる 上記は鼓膜体温計について説明したが、この光学系は一
般の局所部分の温度を測定する放射温度計用としても適
用することができる。The elliptical reflecting mirror 1 uses a part of an elliptical orbit.
Therefore, the optical system has a small numerical aperture (NA) and a small aberration. The concave mirror is formed by resin molding, and the surface is coated with a metal reflection film. In order to detect the infrared light 8 reflected by the elliptical reflecting mirror 1, a small and highly sensitive pyroelectric infrared detector 2 is used. An electronic circuit unit for converting a signal from the pyroelectric infrared detector 2 into a temperature value and a display for displaying the value are provided inside or outside the housing 5 in addition to the above (shown in the drawing). Zu). The tube 3 is made of a resin having a conical shape and a low thermal conductivity so that it can be smoothly inserted into the ear canal from the ear canal entrance 11, and is made of a material that does not feel cold even when it comes into contact with the skin. . The tube is fixed to the housing 5, and only the infrared light 8 from the deep eardrum 9 that has passed through the F2 focal point 7 of the eardrum 9 passes through the inside of the tube 3 as a thin beam. When actually using the thermometer, first, hold the housing 5 of the thermometer, lightly insert the conical portion of the tube 3 into the ear canal entrance 11 and push it into the external auditory canal 10. Search for the peak of the amount of infrared light while adjusting the direction. At the peak position, F of infrared light 8 from eardrum 9
Only the light passing through the two focal points enters the cylinder 3 and is reflected by the elliptical reflecting mirror 1 and enters the pyroelectric infrared detector 2. Therefore, the unintended infrared light 8 from the external auditory canal 10 does not enter the elliptical reflecting mirror 1 through the tube 3, so that a highly accurate and highly accurate temperature can be measured. Thus, the elliptical reflecting mirror 1
Is used, so that an optical system with a small numerical aperture and no aberration is configured, and the temperature of the deep part of the eardrum 9 can be easily measured with a thin infrared beam. However, this optical system can also be applied to a radiation thermometer that measures the temperature of a general local part.
【００１６】[0016]
【発明の効果】本発明の鼓膜体温計は上記のように構成
されており、外耳道１０内で筒３の開口部４の方向を調
節しつつ赤外光量のピークサーチをすることで、鼓膜９
以外からの赤外光を受光することなく、鼓膜９の小さい
面からのみの細いビームの赤外光８を捉えることができ
るので、精度の高い鼓膜温度を測定することができる。
また、細いビームを計測することができる光学系である
ため、校正測定をする場合、小さな標準黒体炉で済み、
したがって多数個同時校正などが可能で、生産性の向上
に寄与する。The eardrum thermometer of the present invention is constructed as described above, and performs a peak search for the amount of infrared light while adjusting the direction of the opening 4 of the tube 3 in the external auditory canal 10 to obtain the eardrum 9.
Since infrared light 8 of a narrow beam can be captured only from the small surface of the eardrum 9 without receiving infrared light from other sources, it is possible to measure the eardrum temperature with high accuracy.
In addition, because the optical system can measure narrow beams, when performing calibration measurement, a small standard blackbody furnace is sufficient.
Therefore, it is possible to calibrate a large number of devices at the same time, which contributes to an improvement in productivity.
【００１７】さらに、光ファイバー等を使用せずに構造
が簡単なためコスト低減になる。Furthermore, the cost is reduced because the structure is simple without using an optical fiber or the like.
【図１】 本発明の鼓膜体温計の一実施例を示す図であ
る。FIG. 1 is a diagram showing one embodiment of an eardrum thermometer of the present invention.
【図２】 従来の導光管式の鼓膜体温計を示す図であ
る。FIG. 2 is a diagram showing a conventional light guide tube type eardrum thermometer.
【図３】 従来の光ファイバー式の鼓膜体温計を示す図
である。FIG. 3 is a diagram showing a conventional optical fiber type eardrum thermometer.
１ 楕円反射鏡 ２ 焦電型赤外線検出器 ３ 筒 ４ 開口部 ５ 筐体 ６ Ｆ１焦点 ７ Ｆ２焦点 ８ 赤外光 ９ 鼓膜 １０ 外耳道 １１ 耳道入口部 １２ 耳殻 １３ 導光管 １４ レンズ １５ 光ファイバー REFERENCE SIGNS LIST 1 elliptical reflecting mirror 2 pyroelectric infrared detector 3 cylinder 4 opening 5 housing 6 F1 focus 7 F2 focus 8 infrared light 9 eardrum 10 ear canal 11 ear canal entrance 12 ear shell 13 light guide tube 14 lens 15 optical fiber
Claims (1)
それを固定している筐体内に、開口数の小さい凹面状の
楕円反射鏡を備え、その楕円の焦点位置に赤外線検出器
を設け、前記筒の開口部の先端から外に筒長手方向に楕
円の他方の焦点位置がくるように、楕円反射鏡、赤外線
検出器および筒の開口部を光学的に配置することによ
り、筒の開口部から入射する赤外光を赤外線検出器で捉
えて温度を検出することができるようにしたことを特徴
とする鼓膜体温計。A hollow conical cylinder having an opening at a tip thereof;
A concave elliptical reflecting mirror having a small numerical aperture is provided in the housing in which it is fixed, and an infrared detector is provided at the focal position of the ellipse. By optically arranging the elliptical reflector, the infrared detector, and the opening of the tube so that the other focal position of the tube comes, the infrared light incident from the opening of the tube is captured by the infrared detector and the temperature is measured. An eardrum thermometer characterized in that it can be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9357931A JPH11188008A (en) | 1997-12-25 | 1997-12-25 | Ear drum thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9357931A JPH11188008A (en) | 1997-12-25 | 1997-12-25 | Ear drum thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11188008A true JPH11188008A (en) | 1999-07-13 |
Family
ID=18456678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9357931A Pending JPH11188008A (en) | 1997-12-25 | 1997-12-25 | Ear drum thermometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11188008A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7927012B2 (en) | 2003-01-06 | 2011-04-19 | Covidien Ag | Probe cover cassette with improved probe cover support |
| USRE43745E1 (en) | 2005-11-23 | 2012-10-16 | Tyco Healthcare Group Lp | Tympanic thermometer probe cover with film support mechanism |
| CN105051507A (en) * | 2012-11-19 | 2015-11-11 | 卡兹欧洲公司 | Medical radiation thermometer having an improved optics system |
| KR20170086562A (en) * | 2014-11-25 | 2017-07-26 | 이노바 디자인 솔루션즈 리미티드 | Portable physiology monitor |
| RU208178U1 (en) * | 2021-08-20 | 2021-12-07 | Общество с ограниченной ответственностью «РД Групп" | A device for identifying people with an increased body temperature |
-
1997
- 1997-12-25 JP JP9357931A patent/JPH11188008A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7927012B2 (en) | 2003-01-06 | 2011-04-19 | Covidien Ag | Probe cover cassette with improved probe cover support |
| USRE43745E1 (en) | 2005-11-23 | 2012-10-16 | Tyco Healthcare Group Lp | Tympanic thermometer probe cover with film support mechanism |
| CN105051507A (en) * | 2012-11-19 | 2015-11-11 | 卡兹欧洲公司 | Medical radiation thermometer having an improved optics system |
| JP2015535599A (en) * | 2012-11-19 | 2015-12-14 | カズ ヨーロッパ エスエー | Medical thermometer with improved optical system |
| JP2017201328A (en) * | 2012-11-19 | 2017-11-09 | カズ ヨーロッパ エス・アー・エール・エル | Medical thermometer having improved optics system |
| US10054490B2 (en) | 2012-11-19 | 2018-08-21 | Helen Of Troy Limited | Medical thermometer having an improved optics system |
| EP2920563B1 (en) * | 2012-11-19 | 2019-12-25 | KAZ Europe SA | Medical radiation thermometer having an improved optics system |
| KR20170086562A (en) * | 2014-11-25 | 2017-07-26 | 이노바 디자인 솔루션즈 리미티드 | Portable physiology monitor |
| RU208178U1 (en) * | 2021-08-20 | 2021-12-07 | Общество с ограниченной ответственностью «РД Групп" | A device for identifying people with an increased body temperature |
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