JPH0442935B2 - - Google Patents
Info
- Publication number
- JPH0442935B2 JPH0442935B2 JP1296613A JP29661389A JPH0442935B2 JP H0442935 B2 JPH0442935 B2 JP H0442935B2 JP 1296613 A JP1296613 A JP 1296613A JP 29661389 A JP29661389 A JP 29661389A JP H0442935 B2 JPH0442935 B2 JP H0442935B2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- resistance heating
- temperature
- resistance
- skin
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 description 33
- 230000004044 response Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005316 response function Methods 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 230000008512 biological response Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
Landscapes
- Measuring And Recording Apparatus For Diagnosis (AREA)
Description
【発明の詳細な説明】
≪産業上の利用分野≫
この発明は、生体に熱刺激を与えたときの皮膚
温度の変化を調べるための装置に関する。DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a device for examining changes in skin temperature when a thermal stimulus is applied to a living body.
≪従来の技術≫
生体の痛覚の応答計測には熱刺激による発痛手
法が臨床応用に最適とされているが、そのために
は皮膚温度を正確に測定することが重要である。<<Prior Art>> The pain generation method using thermal stimulation is said to be optimal for clinical application in measuring the pain response of a living body, but for this purpose, it is important to accurately measure skin temperature.
皮膚の測定には、従来、熱電対または輻射熱セ
ンサ（サーモグラフイ）が用いられている。 Conventionally, thermocouples or radiant heat sensors (thermography) are used to measure the skin.
≪発明が解決しようとする課題≫
しかし、熱電対では、熱電対自身の熱容量が大
きく、皮膚から熱を吸収してしまうので、正確な
測定ができない。また、サーモグラフイは、精度
はよいが、装置が大掛かりで、臨床応用には向か
ない。<<Problems to be Solved by the Invention>> However, thermocouples cannot provide accurate measurements because they have a large heat capacity and absorb heat from the skin. Furthermore, although thermography has good accuracy, it requires large-scale equipment and is not suitable for clinical application.
この発明は、熱刺激が容易で、しかも、皮膚温
度を正確に検出することのできる。小形で安価に
提供できる生体の熱応答特性計測装置を提供する
ことを目的とする。 This invention allows for easy thermal stimulation and accurate detection of skin temperature. The purpose of the present invention is to provide a device for measuring thermal response characteristics of a living body that is small and can be provided at low cost.
≪課題を解決するための手段≫
この発明の生体の熱応答特性計測装置は、生体
の皮膚に密着される抵抗発熱体と、抵抗発熱体に
加わる電圧と電流から抵抗発熱体の抵抗値を算出
する手段と、算出した抵抗値と抵抗温度係数から
抵抗発熱体の温度を算出する手段を備えている。<<Means for Solving the Problem>> The biological thermal response characteristic measuring device of the present invention calculates the resistance value of the resistance heating element from the resistance heating element that is brought into close contact with the skin of the living body and the voltage and current applied to the resistance heating element. and means for calculating the temperature of the resistance heating element from the calculated resistance value and resistance temperature coefficient.
抵抗発熱体の駆動方法は種々考えられるが、抵
抗発熱体の発熱量が一定になるよう、または、抵
抗発熱体の温度が一定になるよう制御することが
できる。 Although various methods of driving the resistance heating element can be considered, it is possible to control the resistance heating element so that the amount of heat generated by the resistance heating element is constant, or the temperature of the resistance heating element is constant.
≪作 用≫
抵抗発熱体は皮膚に密着されているので、抵抗
発熱体とその直下の皮膚温度はほぼ等しい。した
がつて、抵抗発熱体の温度を計測することによ
り、抵抗発熱体で加熱された皮膚の温度変化を知
ることができる。<<Function>> Since the resistance heating element is in close contact with the skin, the temperature of the resistance heating element and the skin directly below it are approximately equal. Therefore, by measuring the temperature of the resistance heating element, it is possible to know the temperature change of the skin heated by the resistance heating element.
≪実施例≫
第１図において、符号１は抵抗発熱体である。
この抵抗発熱体は、一辺が数ミリメータの薄い基
板１ａの上に白金線のような抵抗線１ｂをグリツ
ド状にして接着したものであり、ストレンゲージ
に似た構造になつている。測定に際しては、基板
１ａを生体の皮膚に接着する。<<Example>> In FIG. 1, reference numeral 1 indicates a resistance heating element.
This resistance heating element has a structure similar to a strain gauge, in which resistance wires 1b such as platinum wires are bonded in the form of a grid onto a thin substrate 1a with a side of several millimeters. During the measurement, the substrate 1a is adhered to the skin of the living body.
符号２は電流制御素子、符号３は小抵抗、符号
４，５はいずれも増幅器である。増幅器４は小抵
抗３の電圧降下から抵抗発熱体１を流れる電流値
Ｉを求める。一方、増幅器５は抵抗発熱体１の電
圧Ｖを計測する。 Reference numeral 2 is a current control element, reference numeral 3 is a small resistor, and reference numerals 4 and 5 are amplifiers. The amplifier 4 determines the current value I flowing through the resistive heating element 1 from the voltage drop across the small resistor 3. On the other hand, the amplifier 5 measures the voltage V of the resistance heating element 1.
符号６は乗算器、符号７は除算器である。増幅
器４，５で計測された抵抗発熱体の電流と電圧は
乗算器６に導かれ、これからＶ×Ｉ、すなわち抵
抗発熱体の電力Ｐが算出される。同時に、抵抗発
熱体の電流と電圧は除算器７に導かれ、これから
Ｖ／Ｉすなわち抵抗発熱体の抵抗値Ｒが算出され
る。 Reference numeral 6 is a multiplier, and reference numeral 7 is a divider. The current and voltage of the resistance heating element measured by the amplifiers 4 and 5 are led to a multiplier 6, from which V×I, that is, the power P of the resistance heating element, is calculated. At the same time, the current and voltage of the resistance heating element are led to a divider 7, from which V/I, that is, the resistance value R of the resistance heating element is calculated.
符号８は関数発生器であり、これには、抵抗発
熱体１の温度と抵抗値の関係を予め計測して、そ
の関係式が組み込まれている。この関数発生器８
に抵抗発熱体１の抵抗値Ｒを入力し、抵抗発熱体
の温度Ｔが出力される。 Reference numeral 8 denotes a function generator, which measures the relationship between the temperature and resistance value of the resistance heating element 1 in advance and incorporates the relational expression. This function generator 8
The resistance value R of the resistance heating element 1 is inputted into , and the temperature T of the resistance heating element is output.
符号９，１０はいずれもフイードバツク増幅
器、符号１１は抵抗発熱体の電力（発熱量）を設
定するポテンシヨメータ、符号１２は抵抗発熱体
の温度を設定するポテンシヨメータである。 Reference numerals 9 and 10 are both feedback amplifiers, reference numeral 11 is a potentiometer for setting the electric power (heat amount) of the resistance heating element, and reference numeral 12 is a potentiometer for setting the temperature of the resistance heating element.
いま、スイツチ１３が定電力モードになつてい
ると、ポテンシヨメータ１１で設定された電力に
なるように電流制御素子がフイードバツク制御さ
れ、ヒータ１には一定の電力が供給される。 If the switch 13 is now in the constant power mode, the current control element is feedback-controlled so that the power is set by the potentiometer 11, and constant power is supplied to the heater 1.
このときの、抵抗発熱体の電力（発熱量）と皮
膚温度の関係を示したのが第２図であるが、皮膚
温度が上昇する度合いを比較することにより、皮
膚温度の変化に対応する生体応答の機能（熱拡散
機能、血流量変化による冷却機能）を調べること
ができる。 Figure 2 shows the relationship between the electric power (heat amount) of the resistance heating element and the skin temperature at this time. Response functions (thermal diffusion function, cooling function due to changes in blood flow) can be investigated.
スイツチを定温度モードに切り替えると、ポテ
ンシヨメータ１２で与えられた設定温度に等しく
なるように電流制御素子が制御され、皮膚温度は
一定に保たれる。このときの、電力と皮膚温度の
関係を示したのが第３図であり、発熱量の変化か
ら生体応答の機能を調べることができる。 When the switch is switched to constant temperature mode, the current control element is controlled to be equal to the set temperature given by potentiometer 12, and the skin temperature is kept constant. FIG. 3 shows the relationship between electric power and skin temperature at this time, and the biological response function can be investigated from changes in calorific value.
≪発明の効果≫
この発明は、皮膚に密着された抵抗発熱体で皮
膚を加熱すると共に、抵抗発熱体の抵抗値の変化
から抵抗発熱体の温度を計測し、これによつて近
似的に皮膚温度の変化を知るようにしたものであ
り、１つの素子で加熱と温度測定が可能であつて
構造がきわめてシンプルであり、生体の熱応答特
性を調べるのに有益である。≪Effects of the Invention≫ This invention heats the skin with a resistance heating element that is in close contact with the skin, and measures the temperature of the resistance heating element from changes in the resistance value of the resistance heating element, thereby approximately measuring the skin temperature. This device is designed to detect changes in temperature, is capable of heating and measuring temperature with a single device, has an extremely simple structure, and is useful for investigating the thermal response characteristics of living organisms.
発熱量が一定になるよう抵抗発熱体の駆動電流
をフイードバツク制御すれば、皮膚温度の変化か
ら生体の熱応答特性を知ることができる。 If the drive current of the resistance heating element is feedback-controlled so that the amount of heat generated remains constant, the thermal response characteristics of the living body can be determined from changes in skin temperature.
温度が一定になるようを抵抗発熱体の駆動電流
をフイードバツク制御すれば、発熱量の変化から
生体の熱応答特性を知ることができる。 If the drive current of the resistance heating element is feedback-controlled so that the temperature remains constant, the thermal response characteristics of the living body can be determined from changes in the amount of heat generated.
第１図は熱応答特性計測装置の説明図、第２図
は定電力モードにおける発熱量と温度の関係を示
したもの、第３図は定温度モードにおける関係を
示したものである。
１……抵抗発熱体、６……乗算器、７……除算
器、８……関数発生器。
FIG. 1 is an explanatory diagram of the thermal response characteristic measuring device, FIG. 2 is a diagram showing the relationship between the amount of heat generated and temperature in constant power mode, and FIG. 3 is a diagram showing the relationship in constant temperature mode. 1... Resistance heating element, 6... Multiplier, 7... Divider, 8... Function generator.
Claims (1)
抵抗発熱体に加わる電圧と電流から抵抗発熱体の
抵抗値を算出する手段７と、算出した抵抗値と抵
抗温度係数から該抵抗発熱体の温度を算出する手
段８を備えた生体の熱応答特性計測装置。 ２ 該抵抗発熱体の発熱量が一定になるよう該抵
抗発熱体の駆動電流がフイードバツク制御される
請求項１の生体の熱応答特性計測装置。 ３ 該抵抗発熱体の温度が一定になるようを該抵
抗発熱体の駆動電流がフイードバツク制御される
請求項１の生体の熱応答特性計測装置。[Scope of Claims] 1. A resistance heating element 1 that is in close contact with the skin of a living body, means 7 for calculating the resistance value of the resistance heating element from the voltage and current applied to the resistance heating element, and a means 7 for calculating the resistance value of the resistance heating element from the voltage and current applied to the resistance heating element, and calculating the resistance value and resistance temperature of the resistance heating element. A biological thermal response characteristic measuring device comprising means 8 for calculating the temperature of the resistance heating element from the coefficient. 2. The thermal response characteristic measuring device of a living body according to claim 1, wherein the drive current of the resistance heating element is feedback-controlled so that the amount of heat generated by the resistance heating element is constant. 3. The thermal response characteristic measuring device of a living body according to claim 1, wherein the drive current of the resistance heating element is feedback-controlled so that the temperature of the resistance heating element is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1296613A JPH03158129A (en) | 1989-11-15 | 1989-11-15 | Device for measuring heat responsive property of living body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1296613A JPH03158129A (en) | 1989-11-15 | 1989-11-15 | Device for measuring heat responsive property of living body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03158129A JPH03158129A (en) | 1991-07-08 |
| JPH0442935B2 true JPH0442935B2 (en) | 1992-07-15 |
Family
ID=17835820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1296613A Granted JPH03158129A (en) | 1989-11-15 | 1989-11-15 | Device for measuring heat responsive property of living body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03158129A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5202299A (en) * | 1991-12-23 | 1993-04-13 | General Motors Corporation | Catalytic washcoat for treatment of diesel exhaust |
| JP2955651B2 (en) * | 1998-01-22 | 1999-10-04 | 工業技術院長 | Contact thermal sensation measuring device |
-
1989
- 1989-11-15 JP JP1296613A patent/JPH03158129A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03158129A (en) | 1991-07-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |