JPH0566534B2 - - Google Patents
Info
- Publication number
- JPH0566534B2 JPH0566534B2 JP59241387A JP24138784A JPH0566534B2 JP H0566534 B2 JPH0566534 B2 JP H0566534B2 JP 59241387 A JP59241387 A JP 59241387A JP 24138784 A JP24138784 A JP 24138784A JP H0566534 B2 JPH0566534 B2 JP H0566534B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- oscillation frequency
- resistor
- oscillator
- counter
- 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 - Fee Related
Links
- 230000010355 oscillation Effects 0.000 claims description 15
- 238000009529 body temperature measurement Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は電気的に温度を計測する温度測定装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a temperature measuring device that electrically measures temperature.
温度測定装置には温度検出素子として温度によ
り非線形的に抵抗が変化するサーミスタ等の感温
抵抗が用いられている。この感温抵抗は抵抗値に
バラツキがあるため、温度検出用として用いる場
合には、抵抗値のバラツキにより正確な温度測定
が難しいという問題点があつた。
A temperature sensing element such as a thermistor whose resistance changes non-linearly depending on the temperature is used as a temperature detection element in a temperature measuring device. Since this temperature-sensitive resistor has variations in resistance value, when used for temperature detection, there is a problem in that accurate temperature measurement is difficult due to variations in resistance value.
この発明は、上記の問題点を解決するためにな
されたもので、きめ細かく、精度の高い温度測定
を実現することができる温度測定装置を提供する
ことを目的とする。
This invention was made to solve the above-mentioned problems, and an object thereof is to provide a temperature measuring device that can realize detailed and highly accurate temperature measurement.
この発明は、感温抵抗を接続したときの発振周
波数と基準抵抗を接続したときの発振周波数のそ
れぞれの周波数パルスをアツプ・ダウンカウント
することで、これら発振周波数の差から温度に対
応したカウント値を求め、このカウント値に基づ
いてメモリの内容を読み出し、表示部に温度値を
表示するようにしている。
In this invention, by counting up and down the frequency pulses of the oscillation frequency when a temperature-sensitive resistor is connected and the oscillation frequency when a reference resistor is connected, the count value corresponding to the temperature is calculated from the difference between these oscillation frequencies. is calculated, the contents of the memory are read out based on this count value, and the temperature value is displayed on the display section.
この発明によれば、感温抵抗を接続したときの
発振周波数と基準抵抗を接続したときの発振周波
数のそれぞれの周波数パルスの実測された値を他
のパラメータに置き換えることなく、この実測し
た値に基づいて温度値が求められることになるの
で、きめ細かく、精度の高い温度測定を実現する
ことが可能になる。
According to this invention, the measured values of the frequency pulses of the oscillation frequency when the temperature-sensitive resistor is connected and the oscillation frequency when the reference resistor is connected are used without replacing them with other parameters. Since the temperature value can be determined based on this, it becomes possible to realize detailed and highly accurate temperature measurement.
以下、図面を参照してこの発明の一実施例を説
明する。
Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
添付図面において、１は温度に対して線形な特
性を有する感温抵抗、２は温度係数が比較的小さ
い基準抵抗で、これらの抵抗１，２はコンデンサ
３とともに時定数回路を構成し、それぞれ測温発
振器４に接続されている。測温発振器４はステツ
プコントローラ５の切換制御信号S1により感温抵
抗１および基準抵抗２を切換接続し、感温抵抗１
が接続されたときには感温抵抗１、コンデンサ３
の時定数によつて発振周波数Xの出力信号S2を発
生し、また基準抵抗２が接続されたときには基準
抵抗２、コンデンサ３の時定数によつて発振周波
数Sの出力信号S3を発生する。これらの出力信号
S2，S3は測温カウンタ６に送られる。 In the attached drawings, 1 is a temperature-sensitive resistor that has linear characteristics with respect to temperature, 2 is a reference resistor with a relatively small temperature coefficient, and these resistors 1 and 2 constitute a time constant circuit together with a capacitor 3, and each It is connected to the temperature oscillator 4. The temperature measuring oscillator 4 switches and connects the temperature sensitive resistor 1 and the reference resistor 2 in accordance with the switching control signal S1 of the step controller 5.
When connected, temperature sensitive resistor 1, capacitor 3
generates an output signal S 2 of oscillation frequency . These output signals
S 2 and S 3 are sent to the temperature counter 6.
このとき、感温抵抗１が測温発振器４に接続さ
れていると、測温カウンタ６はステツプコントロ
ーラ５からのカウントアツプ信号S4によつてアツ
プカウンタに切換えられ、発振周波数Xをある一
定数だけカウントアツプする。続いて基準抵抗２
が測温発振器４に接続されると、ステツプコント
ローラ５からのカウントダウン信号S5によつてダ
ウンカウンタに切換えられ、発振周波数Xをカウ
ントアツプするのに要した時間だけ発振周波数S
をカウントダウンする。その結果、測温カウンタ
６には温度に対応した値が記憶され、その値に対
応する値をアドレスとしてEP−ROM７から温度
データを読み出し、ステツプコントローラ５の制
御信号S6により表示回路８を介してデジタル表示
される。 At this time, if the temperature sensing resistor 1 is connected to the temperature measurement oscillator 4, the temperature measurement counter 6 is switched to an up counter by the count up signal S4 from the step controller 5, and the oscillation frequency Only count up. Next, reference resistance 2
When connected to the temperature measurement oscillator 4, it is switched to a down counter by the countdown signal S5 from the step controller 5, and the oscillation frequency S is changed for the time required to count up the oscillation frequency X.
count down. As a result, a value corresponding to the temperature is stored in the temperature counter 6, and the temperature data is read out from the EP-ROM 7 using the value corresponding to the address as an address, and is read out via the display circuit 8 by the control signal S6 of the step controller 5. displayed digitally.
一方、温度校正時には感温抵抗１を基準温度の
温槽に入れて温度を安定に保つ。次に、EP−
ROM７の書き込み用インターフエイス９を通し
て切換制御信号S1を入力して感温抵抗１および基
準抵抗２を切換えて発振周波数Xの出力信号S2と
発振周波数2の出力信号S3を取り出す。このと
き、測温カウンタ６、EP−ROM７、表示回路８
を介して表示された値が基準温度となるように外
部で演算し、その補正値を書き込みインターフエ
イス９を通してEP−ROM７のアドレスに書き込
む。他の温度についても、感温抵抗１の温度係数
から計算することにより、それぞれの補正値を書
き込みインターフエイス９を通してEP−ROM７
のアドレスに書き込む。なお、感温抵抗１がサー
ミスタである場合には、サーミスタ非線形性の補
正を書き込みインターフエイス９を通してEP−
ROM７に書き込むことができる。 On the other hand, during temperature calibration, the temperature sensitive resistor 1 is placed in a hot bath at a reference temperature to keep the temperature stable. Next, EP−
A switching control signal S1 is input through the writing interface 9 of the ROM 7, and the temperature-sensitive resistor 1 and the reference resistor 2 are switched to take out an output signal S2 of oscillation frequency X and an output signal S3 of oscillation frequency 2 . At this time, temperature measurement counter 6, EP-ROM 7, display circuit 8
Calculations are made externally so that the value displayed via the reference temperature becomes the reference temperature, and the corrected value is written to the address of the EP-ROM 7 via the writing interface 9. For other temperatures, by calculating from the temperature coefficient of the temperature sensitive resistor 1, the respective correction values are written to the EP-ROM 7 through the writing interface 9.
write to the address of If the temperature-sensitive resistor 1 is a thermistor, correction of thermistor nonlinearity is performed via the writing interface 9.
Can be written to ROM7.
したがつて、このような構成によれば、感温抵
抗を接続したときの発振周波数と基準抵抗を接続
したときの発振周波数のそれぞれの周波数パルス
の実測された値を他のパラメータに置き換えるこ
となく、この実測した値に基づいて温度値が求め
られることになるので、きめ細かく、精度の高い
温度測定を実現することが可能になる。 Therefore, with this configuration, the measured values of the frequency pulses of the oscillation frequency when the temperature-sensitive resistor is connected and the oscillation frequency when the reference resistor is connected can be calculated without replacing them with other parameters. Since the temperature value is determined based on this actually measured value, it becomes possible to realize detailed and highly accurate temperature measurement.
なお、この発明は上記実施例に限定されるもの
ではなく、要旨を変更しない範囲において種々変
形して実施することができる。例えばEP−ROM
７はRAMやEEP−ROMであつても何らさしつ
かえない。 Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist. For example, EP-ROM
7 may be RAM or EEP-ROM.
添付図面はこの発明の一実施例の回路構成を示
すブロツク図である。
１……感温抵抗、２……基準抵抗、３……コン
デンサ、４……測温発振器、５……ステツプコン
トローラ、６……測温カウンタ、７……EP−
ROM、８……表示回路。
The accompanying drawing is a block diagram showing the circuit configuration of an embodiment of the present invention. 1... Temperature sensing resistor, 2... Reference resistor, 3... Capacitor, 4... Temperature measuring oscillator, 5... Step controller, 6... Temperature measuring counter, 7... EP-
ROM, 8...display circuit.
Claims (1)
つの抵抗のいずれか一方と時定数回路を構成する
測温発振器と、 前記感温抵抗を接続したときの前記発振器の発
振周波数と前記基準抵抗を接続したときの前記発
振器の発振周波数のそれぞれの周波数パルスの差
を実測してそのカウント値を保持する測温カウン
タと、 前記測温発振器のバラツキに対する補正値が予
め設定されたメモリと、 前記測温カウンタのカウント値により前記メモ
リより読み出された出力に基づいて温度値を表示
する表示部とを具備したことを特徴とする温度測
定装置。[Claims] 1. A temperature measuring oscillator that switches between a temperature-sensitive resistor and a reference resistor to configure a time constant circuit with one of these two resistors, and an oscillation frequency of the oscillator when the temperature-sensitive resistor is connected. and a temperature measuring counter that actually measures the difference between the respective frequency pulses of the oscillation frequency of the oscillator when the reference resistor is connected to the temperature measuring counter and holds the counted value; A temperature measurement device comprising: a memory; and a display section that displays a temperature value based on an output read from the memory based on a count value of the temperature measurement counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24138784A JPS61118632A (en) | 1984-11-15 | 1984-11-15 | Apparatus for measuring temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24138784A JPS61118632A (en) | 1984-11-15 | 1984-11-15 | Apparatus for measuring temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61118632A JPS61118632A (en) | 1986-06-05 |
| JPH0566534B2 true JPH0566534B2 (en) | 1993-09-22 |
Family
ID=17073526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24138784A Granted JPS61118632A (en) | 1984-11-15 | 1984-11-15 | Apparatus for measuring temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61118632A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100656430B1 (en) * | 2005-11-09 | 2006-12-11 | 주식회사 하이닉스반도체 | Temperature detecting apparatus |
| JP5701564B2 (en) * | 2010-10-18 | 2015-04-15 | ラピスセミコンダクタ株式会社 | Semiconductor integrated circuit and measurement temperature detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59225325A (en) * | 1983-06-06 | 1984-12-18 | Terumo Corp | Preparation of electronic thermometer |
| JPS59225324A (en) * | 1983-06-06 | 1984-12-18 | Terumo Corp | Electronic thermometer |
| JPS59225323A (en) * | 1983-06-06 | 1984-12-18 | Terumo Corp | Electronic thermometer |
-
1984
- 1984-11-15 JP JP24138784A patent/JPS61118632A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59225325A (en) * | 1983-06-06 | 1984-12-18 | Terumo Corp | Preparation of electronic thermometer |
| JPS59225324A (en) * | 1983-06-06 | 1984-12-18 | Terumo Corp | Electronic thermometer |
| JPS59225323A (en) * | 1983-06-06 | 1984-12-18 | Terumo Corp | Electronic thermometer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61118632A (en) | 1986-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |