JPH0126494B2 - - Google Patents
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- Publication number
- JPH0126494B2 JPH0126494B2 JP57116280A JP11628082A JPH0126494B2 JP H0126494 B2 JPH0126494 B2 JP H0126494B2 JP 57116280 A JP57116280 A JP 57116280A JP 11628082 A JP11628082 A JP 11628082A JP H0126494 B2 JPH0126494 B2 JP H0126494B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- resistance value
- thermistor
- circuit
- resistor
- 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
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
- G01K7/245—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit in an oscillator circuit
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【発明の詳細な説明】
本発明は温度検出装置に関し、特に抵抗値が温
度依存性を有するサーミスタの抵抗値変化を利用
して発振器の発振周波数を変化させて温度を検出
する温度検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature detection device, and more particularly to a temperature detection device that detects temperature by changing the oscillation frequency of an oscillator using changes in the resistance value of a thermistor whose resistance value is temperature dependent.
従来、温度を周波数に変換して検出する温度検
出装置としては、サーミスタに電流を流し、その
抵抗変化によつて生ずる電圧変化をＡ／Ｄ変換器
によつてデジタル化する方式、サーミスタに生じ
る電圧変化を電圧制御発振回路に供給して電圧−
周波数変換を行なう方式等が提案されている。 Conventionally, temperature detection devices that convert temperature into frequency and detect it include a method in which current is passed through a thermistor and the voltage change caused by the change in resistance is digitized by an A/D converter, and a method in which the voltage generated in the thermistor is digitized. The change is supplied to the voltage controlled oscillator circuit and the voltage -
Methods for performing frequency conversion have been proposed.
然し乍ら、サーミスタは温度に対する抵抗値の
変化が非直線性を有するので、サーミスタに生じ
る電圧を直接Ａ／Ｄ変換またはＶ−Ｆ変換する
と、温度に対して正確に比例した検出出力を得る
ことができず、このためサーミスタの抵抗変化を
温度に対して直線性を有するようにリニアライザ
等の補正回路を必要とし、回路構成が複雑高価と
なる欠点を有していた。 However, since the thermistor has non-linearity in the change in resistance value with respect to temperature, if the voltage generated in the thermistor is directly A/D converted or V-F converted, a detection output that is accurately proportional to the temperature cannot be obtained. First, this requires a correction circuit such as a linearizer so that the resistance change of the thermistor has linearity with respect to temperature, which has the disadvantage that the circuit configuration is complicated and expensive.
本発明の目的は、発振回路の周波数可変抵抗と
して、温度に対して殆んど抵抗値が変化しない抵
抗と、温度に対して抵抗値が変化するサーミスタ
との直列回路を適用することによつて、それらの
合成抵抗値の逆数を温度に対して直線性を持た
せ、補正回路を要することなく温度に正確に比例
した周波数発振出力を得ることができる温度検出
装置を提供するものである。 An object of the present invention is to apply a series circuit of a resistor whose resistance value hardly changes with temperature and a thermistor whose resistance value changes with temperature as a variable frequency resistor of an oscillation circuit. , the reciprocal of their combined resistance value has linearity with respect to temperature, thereby providing a temperature detection device capable of obtaining a frequency oscillation output accurately proportional to temperature without requiring a correction circuit.
以下、図面に基づいて本発明の好適な実施例を
説明する。 Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
第１図Ａは本発明のブロツク図を示すもので、
合成抵抗値の逆数１／Ｒをリニアにしたサーミス
タ回路５を発振回路６に接続し、温度に比例した
発振出力ｆが得られるように構成されている。 FIG. 1A shows a block diagram of the present invention.
A thermistor circuit 5 in which the reciprocal 1/R of the combined resistance value is made linear is connected to an oscillation circuit 6, so that an oscillation output f proportional to temperature can be obtained.
第１図Ｂにおいて、１，２は直列に接続された
インバータ、３はインバータ１の入力側及びイン
バータ２の出力側間に接続された充放電用コンデ
ンサ、４及び５はインバータ１の入力側及び出力
側間に介挿された帰還抵抗であり、全体として非
安定マルチバイブレータ構成の発振回路６が構成
されている。 In Fig. 1B, 1 and 2 are inverters connected in series, 3 is a charging/discharging capacitor connected between the input side of inverter 1 and the output side of inverter 2, and 4 and 5 are the input side of inverter 1 and the output side of inverter 2. This is a feedback resistor inserted between the output sides, and the oscillation circuit 6 has an unstable multivibrator configuration as a whole.
この発振回路６はコンデンサ３の容量Ｃと抵抗
４及び５の抵抗値R1及びR2とによつて定まる時
定数に基づいて、ｆ＝１／2.2（R1＋R2）Ｃで表わさ
れる周波数ｆの発振出力が得られる。 This oscillation circuit 6 has a frequency expressed by f=1/2.2(R 1 +R 2 )C based on a time constant determined by the capacitance C of the capacitor 3 and the resistance values R 1 and R 2 of the resistors 4 and 5. An oscillation output of f is obtained.
而して、本発明においては、周波数可変抵抗５
が第２図に示すように温度に対して殆んど抵抗値
が変化しない抵抗８と、温度に対して抵抗値が変
化するサーミスタ９との直列回路で構成されてい
る。 Therefore, in the present invention, the frequency variable resistor 5
As shown in FIG. 2, it is composed of a series circuit consisting of a resistor 8 whose resistance value hardly changes with temperature, and a thermistor 9 whose resistance value changes with temperature.
この場合抵抗８の抵抗値をR3、サーミスタ９
の抵抗値をRT1とすると、これらの合成抵抗値Ｒ
はＲ＝R3＋RT1で表わされ、またサーミスタ９の
抵抗値RT1はRT1＝R01 exp B1（１／Ｔ−１／T0）
（但しR01は周囲温度T0（〓）のときの抵抗値、T0
は一般に298〓（25℃）を基準とし、B1はサーミ
スタ定数である。）で表わされる。 In this case, the resistance value of resistor 8 is R 3 and thermistor 9 is
Let the resistance value of R T1 be the combined resistance value R
is expressed as R=R 3 +R T1 , and the resistance value R T1 of the thermistor 9 is R T1 = R 01 exp B 1 (1/T-1/T 0 )
(However, R 01 is the resistance value at ambient temperature T 0 (〓), T 0
is generally based on 298〓 (25℃), and B 1 is the thermistor constant. ).
そして合成抵抗値Ｒの逆数をＹとすると、Ｙ＝
１／Ｒ＝１／R3＋RT1で表わされ、この逆数Ｙを温
度変化に対して直線性を有するように抵抗値R3、
R01及びB1が夫々選定されている。 And if the reciprocal of the combined resistance value R is Y, then Y=
It is expressed as 1/R=1/R 3 +R T1 , and the reciprocal Y is set to the resistance value R 3 , so that it has linearity with respect to temperature changes.
R 01 and B 1 are selected, respectively.
即ち、サーミスタ９の抵抗値RT1が温度（℃）
に対して第３図Ａで曲線Ｘで示す特性を有する場
合、抵抗８の抵抗値R3を直線Ｙで示すように選
定することによつて、合成抵抗値Ｒを曲線Ｚで示
すように補正すると、逆数Ｙは温度（℃）に対し
て第３図Ｂに示す如く、０℃〜約60℃の有効範囲
で直線性を有する線Ｆで表わされることになる。 In other words, the resistance value R T1 of thermistor 9 is the temperature (℃)
3A, the combined resistance value R is corrected as shown by the curve Z by selecting the resistance value R 3 of the resistor 8 as shown by the straight line Y. Then, the reciprocal Y is expressed by a line F having linearity over the effective range of 0°C to about 60°C, as shown in FIG. 3B, with respect to temperature (°C).
従つて、前記有効範囲内における、温度変化に
対する発振回路６の出力周波数ｆは、温度変化に
対して正確に比例したものとなる。 Therefore, within the effective range, the output frequency f of the oscillation circuit 6 with respect to temperature change becomes exactly proportional to the temperature change.
以上のように、本発明によれば発振回路の周波
数可変抵抗として、温度変化に対して殆んど抵抗
値が変化しない抵抗と、温度変化に対して抵抗値
が変化するサーミスタとの直列回路を介挿し、そ
の合成抵抗値の逆数を温度に対して直線性を持た
せることによつて、温度に対して正確に比例した
周波数を有する検出出力を得ることができ、然も
そのための構成が電圧制御発振回路、リニアライ
ザ等の補正回路を必要としないので簡単であり、
さらに方形波出力が得られるのでこれを直接計数
することによつて温度表示を行なうことができる
他、Ａ／Ｄ変換回路を必要とせずにコンピユータ
に入力することが可能となり、そのインターフエ
ースを簡易化し得る等の優れた効果を有する。 As described above, according to the present invention, as a frequency variable resistor of an oscillation circuit, a series circuit of a resistor whose resistance value hardly changes with temperature change and a thermistor whose resistance value changes with temperature change is used. By making the reciprocal of the combined resistance value linear with respect to temperature, it is possible to obtain a detection output with a frequency that is accurately proportional to temperature. It is simple because it does not require a controlled oscillation circuit or a correction circuit such as a linearizer.
Furthermore, since a square wave output can be obtained, the temperature can be displayed by directly counting the square wave output, and it can also be input to a computer without the need for an A/D conversion circuit, making the interface simple. It has excellent effects such as being able to transform into
次に本発明の他の実施例を第４図Ａ及びＢにつ
いて説明する。 Next, another embodiment of the present invention will be described with reference to FIGS. 4A and 4B.
第４図Ａにおいては、前記抵抗８及びサーミス
タ９の直列回路と直列に同様の抵抗１０及びサー
ミスタ１１の並列回路を接続したものであり、抵
抗１０の抵抗値をR4、サーミスタ１１の抵抗値
をRT2とすると、合成抵抗値Ｒは、
Ｒ＝R3＋RT1＋R4RT2／R4＋RT2
（但し、RT2＝B02 exp B2（１／Ｔ−１／T0））
で表わされ、逆数Ｙは、
Ｙ＝１／Ｒ＝R4＋RT2／R4RT2＋（R3＋RT1）（R4＋RT2
）
で表わされる。 In FIG. 4A, a parallel circuit of a similar resistor 10 and thermistor 11 is connected in series with the series circuit of the resistor 8 and thermistor 9, and the resistance value of the resistor 10 is R 4 and the resistance value of the thermistor 11 is Assuming that R T2 is, the combined resistance value R is R = R 3 + R T1 + R 4 R T2 /R 4 + R T2 (However, R T2 = B 02 exp B 2 (1/T-1/T 0 )) The reciprocal Y is: Y=1/R=R 4 +R T2 /R 4 R T2 + (R 3 + R T1 ) (R 4 + R T2
).
そして逆数Ｙが温度に対して直線性を有するよ
うにR3、R4、R01、R02、B1、及びB2が選定され
ている。 R 3 , R 4 , R 01 , R 02 , B 1 , and B 2 are selected so that the reciprocal Y has linearity with respect to temperature.
例えば各サーミスタ９，１１の抵抗値RTを
RT＝R0 exp｛Ｂ＋C1（1n（Ｔ／273）／１／273−１／
Ｔ
−1n（373／273）／１／273−１／373）
＋C2（273T−273×373）｝（１／Ｔ−１／273）
としたとき、サーミスタ９について、
R0＝671866Ω（at0℃）、Ｂ＝3876.056〓、C1＝
−32.884022〓、C2＝0.059484963〓とし、サーミ
スタ１１について、R0＝2871464Ω（at0℃）、Ｂ＝
3897.739〓、C1＝−29.84228〓、C2＝0.056893781
〓とし、抵抗８及び１０の抵抗値を夫々R3＝
147KΩ、R4＝184KΩとすると、合成抵抗値Ｒは
第５図Ａに示す如く、温度に対する抵抗値が曲線
Z′で表わされ、逆数Ｙが第５図Ｂに示す如く、温
度に対して直線性を有する直線F′で表わされる。
又第４図Ｂは、第４図Ａの等価回路であり、抵抗
８及び１０′の抵抗値を夫々、R3＝147KΩ及びR4
＝271.694KΩ、サーミスタ９′について、R0＝
3489.403KΩ（at0℃）、Ｂ＝3876.056〓、C1＝−
32.884022〓、C2＝0.059484963〓とし、サーミス
タ１１′について、R0＝750.888KΩ（at0℃）、Ｂ＝
3897.739〓、C1＝−29.84228〓、C2＝0.056893781
〓とすると、合成抵抗値Ｒ及び逆数Ｙは夫々第４
図Ａの回路と全く同じ特性を示し、第５図Ａ及び
Ｂで表わされる。第４図Ａ及びＢの回路は構造の
違いから使用用途に応じて適宜選択する。 For example, the resistance value R T of each thermistor 9, 11 is R T = R 0 exp {B + C 1 (1n (T/273)/1/273-1/
T −1n(373/273)/1/273−1/373) +C 2 (273T−273×373)}(1/T−1/273) Then, for thermistor 9, R 0 =671866Ω(at0 ℃), B=3876.056〓, C 1 =
-32.884022〓, C 2 = 0.059484963〓, and for thermistor 11, R 0 = 2871464Ω (at0℃), B =
3897.739〓, C 1 = −29.84228〓, C 2 = 0.056893781
〓, and the resistance values of resistors 8 and 10 are respectively R 3 =
Assuming 147KΩ and R 4 =184KΩ, the combined resistance value R is as shown in Figure 5A, where the resistance value with respect to temperature is a curve.
Z', and the reciprocal Y is represented by a straight line F' which has linearity with respect to temperature, as shown in FIG. 5B.
FIG. 4B is an equivalent circuit of FIG. 4A, and the resistance values of resistors 8 and 10' are R 3 =147KΩ and R 4
=271.694KΩ, for thermistor 9', R 0 =
3489.403KΩ (at0℃), B=3876.056〓, C 1 =-
32.884022〓, C 2 = 0.059484963〓, and for thermistor 11', R 0 = 750.888KΩ (at0℃), B =
3897.739〓, C 1 = −29.84228〓, C 2 = 0.056893781
〓, the combined resistance value R and the reciprocal Y are the fourth
It exhibits exactly the same characteristics as the circuit in FIG. A, and is represented in FIGS. 5A and 5B. The circuits shown in FIGS. 4A and 4B are selected depending on the intended use due to their different structures.
第６図Ａは発振回路６をタイマー用集積回路２
０（インターシル社製ICM7555IPA）を使用して
構成した実際回路であつて、この回路の周波数ｆ
は、ｆ＝1.44／Ｃ（R1＋2Rt）で表わされる。こ
の場合、R1≪Rtに設定すると、周波数ｆはｆ＝
1.44／2RtCで表わされ、温度が変化することに
よりRtが変化し、周波数ｆが変化する。このと
き、周波数可変抵抗Rtは第４図Ａの構成とし、
第６図Ｂに示す如く、センサー部は高インピーダ
ンスの為サーミスタ２１と固定抵抗２２をできる
だけ近接させ、さらにこれらを囲繞する金属ケー
ス２３及び接続コード２４は接続コードとしてシ
ールド線を適用し、これをアースに接続する事に
より、センサー部、接続コードが他の物質による
静電容量の変化、ノイズ等の影響を防止するよう
にしている。尚、前記回路において、サーミスタ
及び固定抵抗は夫々厚膜サーミスタ及び厚膜抵抗
を使用した。 Figure 6A shows the oscillation circuit 6 and the timer integrated circuit 2.
0 (ICM7555IPA manufactured by Intersil), and the frequency f of this circuit is
is expressed as f=1.44/C(R 1 +2Rt). In this case, if R 1 ≪ Rt is set, the frequency f becomes f=
It is expressed as 1.44/2RtC, and as the temperature changes, Rt changes and the frequency f changes. At this time, the frequency variable resistor Rt has the configuration shown in Fig. 4A,
As shown in FIG. 6B, since the sensor part has high impedance, the thermistor 21 and fixed resistor 22 are placed as close as possible, and the metal case 23 and connection cord 24 that surround them are shielded wires as connection cords. By connecting to ground, the sensor section and connection cord are prevented from being affected by changes in capacitance due to other substances, noise, etc. In the above circuit, a thick film thermistor and a thick film resistor were used as the thermistor and fixed resistor, respectively.
而して第６図Ａの回路において、サーミスタ９
をR0＝2.606MΩ（at0℃）、Ｂ＝4133.15〓、サーミ
スタ１１をR0＝15.854MΩ（at0℃）、Ｂ＝4067.48
〓、コンデンサ３′の容量を500PFとし、Vccを
2.5V印加したときの温度−周波数特性を実測し
た結果、第７図に直線L1で示す如く、温度に対
して直線性を有する発振出力が得られた。尚第７
図において、直線L2はタイマー用ICとしてトム
ソン社製TDB0555DPを使用し、Vccを5V印加し
た場合の特性線であり、何れも温度に対して0゜〜
100℃の広範囲に亘つて直線性を有する。 Therefore, in the circuit of FIG. 6A, the thermistor 9
R 0 = 2.606MΩ (at 0℃), B = 4133.15〓, R 0 = 15.854MΩ (at 0℃), B = 4067.48
〓, the capacitance of capacitor 3' is 500PF, and Vcc is
As a result of actually measuring the temperature-frequency characteristics when 2.5V was applied, an oscillation output having linearity with respect to temperature was obtained, as shown by the straight line L1 in FIG. The 7th
In the figure, the straight line L2 is the characteristic line when TDB0555DP manufactured by Thomson is used as a timer IC and Vcc is applied to 5V.
It has linearity over a wide range of 100℃.
以上のように、本発明の他の実施例によれば、
サーミスタ及び抵抗の直列回路と、サーミスタ及
び抵抗の並列回路を直列に接続することによつ
て、前記実施例に比べて発振回路の発振周波数を
より広範囲に亘つて温度に正確に比例させること
ができる優れた効果を有する。 As described above, according to other embodiments of the present invention,
By connecting a series circuit of a thermistor and a resistor and a parallel circuit of a thermistor and a resistor in series, it is possible to make the oscillation frequency of the oscillation circuit more accurately proportional to the temperature over a wider range than in the previous embodiment. Has excellent effects.
尚上記各実施例において、発振回路は上例に限
定されるものではなく、第８図に示す如き方形波
発振回路を適用することもできる。即ち、第８図
において、１３は差動増幅器、１４は差動増幅器
１３の負入力端及び接地間に介挿された充放電用
コンデンサ、１５は差動増幅器１３の負入力端及
び出力端間に介挿された周波数可変抵抗としての
帰還用抵抗、１６及び１７は差動増幅器１３の正
入力端及び出力端間に接続された分圧用抵抗であ
り、全体として方形波発振回路１８が構成されて
いる。 In each of the above embodiments, the oscillation circuit is not limited to the above example, and a square wave oscillation circuit as shown in FIG. 8 can also be applied. That is, in FIG. 8, 13 is a differential amplifier, 14 is a charging/discharging capacitor inserted between the negative input terminal of the differential amplifier 13 and the ground, and 15 is a capacitor between the negative input terminal and the output terminal of the differential amplifier 13. Feedback resistors 16 and 17 are voltage dividing resistors connected between the positive input terminal and the output terminal of the differential amplifier 13, and the square wave oscillation circuit 18 is constructed as a whole. ing.
この方形波発振回路１８はコンデンサ１４の容
量Ｃと帰還用抵抗１５の抵抗値R0とによつて定
まる時定数CR0に基づいてｆ＝１／2πCR0で表わさ
れる周波数ｆの発振出力が得られ、前記抵抗１５
の抵抗値を可変することによつて周波数ｆが可変
される。従つて、抵抗１５に第２図及び第４図に
示すサーミスタ及び抵抗の直列回路を適用するこ
とによつて前記と同様の作用効果を得ることがで
きる。この外種々の発振回路を適用する事ができ
る。 This square wave oscillation circuit 18 produces an oscillation output with a frequency f expressed by f=1/2πCR 0 based on a time constant CR 0 determined by the capacitance C of the capacitor 14 and the resistance value R 0 of the feedback resistor 15. and the resistor 15
The frequency f can be varied by varying the resistance value of. Therefore, by applying a series circuit of a thermistor and a resistor shown in FIGS. 2 and 4 to the resistor 15, the same effect as described above can be obtained. In addition to this, various oscillation circuits can be applied.
第１図Ａは本発明の概略を示すブロツク図、第
１図Ｂは発振回路の一例を示す回路図、第２図は
本発明に適用し得るサーミスタ及び抵抗回路の一
例を示す回路図、第３図Ａ及びＢは夫々第２図の
抵抗回路の温度−抵抗特性及び温度−抵抗逆数特
性を示す図、第４図Ａ及びＢは夫々本発明に適用
し得るサーミスタ及び抵抗回路の他の例を示す回
路図、第５図Ａ及びＢは夫々その温度−抵抗特性
及び温度−抵抗逆数特性を示す図、第６図Ａは発
振回路の他の例を示す回路図、第６図Ｂは本発明
の一実施例の略線的構成説明図、第７図は温度周
波数特性を示す図、第８図は本発明に適用し得る
発振回路の他の例を示す回路図である。
図中、１，２…インバータ、３，３′…充放電
用コンデンサ、５…周波数可変抵抗、６…発振回
路、８，１０，１０′…抵抗、９，９′，１１，１
１′…サーミスタ、１３…差動増幅器、１４…充
放電用コンデンサ、１５…周波数可変抵抗、１８
…方形波発振回路。
FIG. 1A is a block diagram showing an outline of the present invention, FIG. 1B is a circuit diagram showing an example of an oscillation circuit, FIG. 2 is a circuit diagram showing an example of a thermistor and resistance circuit applicable to the present invention, and FIG. 3A and 3B are diagrams showing the temperature-resistance characteristics and temperature-resistance reciprocal characteristics of the resistance circuit shown in FIG. 2, respectively, and FIGS. 4A and 4B are other examples of the thermistor and resistance circuit applicable to the present invention, respectively. 5A and 5B are diagrams showing the temperature-resistance characteristics and temperature-reciprocal resistance characteristics, respectively. FIG. 6A is a circuit diagram showing another example of the oscillation circuit. FIG. 7 is a diagram showing a schematic configuration of an embodiment of the invention, FIG. 7 is a diagram showing temperature frequency characteristics, and FIG. 8 is a circuit diagram showing another example of an oscillation circuit applicable to the invention. In the figure, 1, 2... Inverter, 3, 3'... Charging/discharging capacitor, 5... Frequency variable resistor, 6... Oscillation circuit, 8, 10, 10'... Resistor, 9, 9', 11, 1
1'... Thermistor, 13... Differential amplifier, 14... Charging/discharging capacitor, 15... Frequency variable resistor, 18
...Square wave oscillation circuit.
Claims (1)
抗値が殆んど変化しない抵抗と温度に対して抵抗
値が変化するサーミスタとの直列回路と、温度に
対して抵抗値が殆んど変化しない抵抗と温度に対
して、抵抗値が変化するサーミスタとの並列回路
との直列回路によつて構成し、その合成抵抗値の
逆数を温度に対して直線性を持たせ、温度変化に
対して比例する周波数の発振出力を得るようにし
たことを特徴とする温度検出装置。 ２ 発振回路の周波数可変抵抗を、温度に対して
抵抗値が殆んど変化しない抵抗と温度に対して抵
抗値が変化するサーミスタとの直列回路と、該直
列回路のサーミスタと並列に接続された抵抗値が
殆んど変化しない抵抗と温度に対して抵抗値が変
化するサーミスタとの直列回路とによつて構成
し、その合成抵抗値の逆数を温度に対して直線性
を持たせ、温度変化に対して比例する周波数の発
振出力を得るようにしたことを特徴とする温度検
出装置。[Scope of Claims] 1. A frequency variable resistor of an oscillation circuit is a series circuit consisting of a resistor whose resistance value hardly changes with temperature, a thermistor whose resistance value changes with temperature, and a series circuit of a thermistor whose resistance value changes with temperature. It consists of a series circuit with a parallel circuit of a thermistor whose resistance value changes with respect to resistance and temperature, which hardly change, and the reciprocal of the combined resistance value has linearity with respect to temperature. A temperature detection device characterized in that it obtains an oscillation output with a frequency proportional to a temperature change. 2. The frequency variable resistor of the oscillation circuit is connected in parallel with a series circuit consisting of a resistor whose resistance value hardly changes with temperature and a thermistor whose resistance value changes with temperature, and the thermistor in the series circuit. It consists of a series circuit of a resistor whose resistance value hardly changes and a thermistor whose resistance value changes with temperature, and the reciprocal of the combined resistance value has linearity with temperature, A temperature detection device characterized in that it obtains an oscillation output with a frequency proportional to .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11628082A JPS597230A (en) | 1982-07-06 | 1982-07-06 | Detector of temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11628082A JPS597230A (en) | 1982-07-06 | 1982-07-06 | Detector of temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS597230A JPS597230A (en) | 1984-01-14 |
| JPH0126494B2 true JPH0126494B2 (en) | 1989-05-24 |
Family
ID=14683157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11628082A Granted JPS597230A (en) | 1982-07-06 | 1982-07-06 | Detector of temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS597230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0748973A (en) * | 1993-08-09 | 1995-02-21 | Natl House Ind Co Ltd | Bay window |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5711576B2 (en) * | 2011-03-17 | 2015-05-07 | 旭化成エレクトロニクス株式会社 | Oscillator and semiconductor device having oscillator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5796227A (en) * | 1980-12-08 | 1982-06-15 | Fujitsu General Ltd | Temperature measuring apparatus |
-
1982
- 1982-07-06 JP JP11628082A patent/JPS597230A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0748973A (en) * | 1993-08-09 | 1995-02-21 | Natl House Ind Co Ltd | Bay window |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS597230A (en) | 1984-01-14 |
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