JPS599525A - Temperature controlling device - Google Patents
Temperature controlling deviceInfo
- Publication number
- JPS599525A JPS599525A JP57116732A JP11673282A JPS599525A JP S599525 A JPS599525 A JP S599525A JP 57116732 A JP57116732 A JP 57116732A JP 11673282 A JP11673282 A JP 11673282A JP S599525 A JPS599525 A JP S599525A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- resistance value
- control
- thermistor
- value
- 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
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Radiation Pyrometers (AREA)
- Control Of Temperature (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は分光光度計に係わり、特に測定サンプルの温度
を詳細に制御したり、検出したりすることが必要な装置
に関するっ
従来の温度制御装置では、ブリッジ回路の一辺を温度に
よシその抵抗値の変わる感熱素子（たとえばサーミスタ
、白金線など）とし、そのブリッジの出力電圧がゼロと
なるように被制御部分を加熱、冷却する方法がとられて
いた。この方法ではブリッジ回路の他の一辺に制御すべ
き温度に対応した精密級の抵抗を必要とし、またその抵
抗は制御すべき温度の点数と等しい数だけ用意し、必要
に応じて切換をしなければならない欠点を持っている。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spectrophotometer, and particularly to a device that requires detailed control and detection of the temperature of a measurement sample. The method used was to use a heat-sensitive element (for example, a thermistor, platinum wire, etc.) whose resistance value changes depending on temperature, and to heat and cool the controlled part so that the output voltage of the bridge was zero. This method requires a precision resistor corresponding to the temperature to be controlled on the other side of the bridge circuit, and the number of such resistors must be equal to the number of temperature points to be controlled, and they must be switched as necessary. It has certain drawbacks.
また従来の温度検出装置では、検出用の感熱素子全制御
用とは別に設けるために、画素子間の温度差に伴なう誤
差が避けられない欠点があった。Further, in the conventional temperature detection device, since the heat-sensitive element for detection is provided separately from the one for overall control, there is a drawback that errors due to temperature differences between the pixel elements are unavoidable.
本発明の目的は、以上の欠点をなくし任意の温度設定を
精Ｗ）な抵抗１・使わないででき、また制御点の温度を
正確に検出できる装置を提供することにある。An object of the present invention is to eliminate the above-mentioned drawbacks, to provide a device that can set an arbitrary temperature without using a precise resistor, and can accurately detect the temperature at a control point.
本発明の感温素子の温度と抵抗値の関数関係を利用し、
また一つの素子で制御と検出を可能ならしめるようにし
たものである。Utilizing the functional relationship between temperature and resistance value of the temperature sensing element of the present invention,
Furthermore, it is possible to perform control and detection using one element.
以下本発明の一実施例を図面によって説明する。An embodiment of the present invention will be described below with reference to the drawings.
１は温度制御すべき部分で例えば吸光分析用のサンプル
セルである。これはヒートブロック２で囲まれ、ベルチ
ェ素子３にて加熱、冷却される。Reference numeral 1 denotes a part whose temperature is to be controlled, such as a sample cell for absorption analysis. This is surrounded by a heat block 2 and heated and cooled by a Bertier element 3.
ヒートブロック２のなかにはサーミスタ４が埋め込まれ
ている。A thermistor 4 is embedded in the heat block 2.
次に温度設定の方法について述べる。Next, we will discuss how to set the temperature.
入力部５より任意の温度値を設定するとそれに対応した
抵抗値が関数演算器Ａ、６によって計算される。この抵
抗値とサーミスタ４の実際の抵抗値が差動演算器７に入
力される。そしてそれら抵抗値の差がゼロになる方向に
制御回路８を介してベルチェ素子３に電流を供給する。When an arbitrary temperature value is set from the input section 5, the corresponding resistance value is calculated by the function calculators A and 6. This resistance value and the actual resistance value of the thermistor 4 are input to the differential calculator 7. Then, a current is supplied to the Vertier element 3 via the control circuit 8 in a direction in which the difference between these resistance values becomes zero.
サーミスタ４の実際の抵抗値は定電流回路９とその電圧
出力全ディジタル量に変換するＡ／Ｄｆ換器１０にて得
る。以上のように、設定された温度に平衡するまで、４
→９→１０→７→８→４のフィードバックループが動作
する。The actual resistance value of the thermistor 4 is obtained by a constant current circuit 9 and an A/Df converter 10 that converts its voltage output into a digital quantity. As above, until the temperature reaches the set temperature,
A feedback loop of →9→10→7→8→4 operates.
本発明の一実施例によれば、測定サンプルの温度を任意
に設定できる他に、温度設定値をあらかじめプログラム
することにより、サンプルの温度を時系列にプログラム
することができる。According to one embodiment of the present invention, in addition to being able to arbitrarily set the temperature of the measurement sample, it is also possible to program the temperature of the sample in chronological order by programming the temperature set value in advance.
次に温度の検出の方法について述べる。Next, a method for detecting temperature will be described.
制御点そのものにあるサーミスタ４の抵抗値（Ａ／Ｉ）
ｆ換器１０の出力）は関数演算器Ｂ。Resistance value of thermistor 4 at the control point itself (A/I)
The output of the f converter 10) is a function calculator B.
１１によって直接に温度に変換され、表示器１２によっ
て表示される。関数演算器Ｂ、１１の演算式は先に述べ
た関数演算器Ａ、６のそれとちょうど逆関数とかつてい
る。11 directly converts it into temperature and displays it on a display 12. The arithmetic expressions of the functional arithmetic units B and 11 are exactly the inverse functions of those of the functional arithmetic units A and 6 mentioned above.
本発明の一実施例によれば制御用のサーミスタの設置点
の温度を譲差々く検出することができる。According to one embodiment of the present invention, it is possible to detect the temperature at the point where the control thermistor is installed.
本発明によれば、感熱素子の温度対抵抗値の関係を計算
で求めるために、従来のような精密級の抵抗を備えたブ
リッジ回路が不要となり、安定性に優れた温度制御がで
きる。また温度設定は直接に温度値にて入力でき、必要
に応じて温度のプログラミングも簡単にできる効果があ
る。According to the present invention, in order to calculate the relationship between the temperature and the resistance value of the heat-sensitive element, there is no need for a conventional bridge circuit equipped with a precision resistor, and temperature control with excellent stability can be achieved. Additionally, the temperature setting can be directly input as a temperature value, which has the effect of making it easy to program the temperature if necessary.
一方制御用と、検出用の感温素子を１個に集約するため
に、従来に見られた別個の感温素子間の温度差が不質的
になくなり、正しい制御温度の値が得られる効果がある
。On the other hand, since the temperature-sensing elements for control and detection are integrated into one, the temperature difference between the separate temperature-sensing elements seen in the past is essentially eliminated, making it possible to obtain the correct control temperature value. There is.
第１図は本発明の一実施例を示す装置の機能ブロック図
である。
１・・・サンプルセル、２・・・ヒートブロック、３・
・・ベルチェ素子、４・・・サーミスタ、５・・・入力
部、６・・・関数演算器、７・・・差動演算器、８・・
・制御回路、９茅ｌ 目
デFIG. 1 is a functional block diagram of an apparatus showing an embodiment of the present invention. 1...sample cell, 2...heat block, 3.
...Bertier element, 4...thermistor, 5...input section, 6...function calculator, 7...differential calculator, 8...
・Control circuit, 9mm
Claims (1)
を有し、設定温度の抵抗値換算を行ない、その換算結果
と制御に用いている当該感温素子の抵抗値を比較し、そ
の差がゼロになるように加熱、又は加熱冷却素子の電圧
又は電圧を制御することを特徴とする温度制御装置。 ２、特許請求の範囲第１項において、関数の逆関数を演
算する部分を有し、制御用感温素子の抵抗値を温度に換
算し表示する温度表示装置を備えたことを特徴とする温
度制御装置。[Claims] 1. It has a part that performs a functional calculation on the relationship between the temperature and the resistance value of the temperature sensing element, converts the set temperature into the resistance value, and uses the conversion result and the temperature sensing element used for control. A temperature control device that compares resistance values and controls heating or voltage of a heating/cooling element so that the difference becomes zero. 2. The temperature according to claim 1, comprising a temperature display device that has a part that calculates an inverse function of the function and that converts and displays the resistance value of the temperature sensing element for control into temperature. Control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57116732A JPS599525A (en) | 1982-07-07 | 1982-07-07 | Temperature controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57116732A JPS599525A (en) | 1982-07-07 | 1982-07-07 | Temperature controlling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS599525A true JPS599525A (en) | 1984-01-18 |
Family
ID=14694415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57116732A Pending JPS599525A (en) | 1982-07-07 | 1982-07-07 | Temperature controlling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS599525A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63115211A (en) * | 1986-11-04 | 1988-05-19 | Fujitsu Ltd | Temperature regulator |
-
1982
- 1982-07-07 JP JP57116732A patent/JPS599525A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63115211A (en) * | 1986-11-04 | 1988-05-19 | Fujitsu Ltd | Temperature regulator |
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