JPH0665973B2 - Radiation thermometer - Google Patents
Radiation thermometerInfo
- Publication number
- JPH0665973B2 JPH0665973B2 JP60026711A JP2671185A JPH0665973B2 JP H0665973 B2 JPH0665973 B2 JP H0665973B2 JP 60026711 A JP60026711 A JP 60026711A JP 2671185 A JP2671185 A JP 2671185A JP H0665973 B2 JPH0665973 B2 JP H0665973B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- variable
- temperature
- detector
- switching
- 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
- 230000005855 radiation Effects 0.000 title claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 238000009529 body temperature measurement Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
- G01J5/808—Calibration using linearising circuits
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、種々の測温範囲の測定が可能な放射温度計
に関するものである。TECHNICAL FIELD The present invention relates to a radiation thermometer capable of measuring various temperature measuring ranges.
［従来の技術］ 熱放射を用いて測定対象の温度を測定する放射温度計に
は、検出器としてSiその他の素子が用いられている。[Prior Art] A radiation thermometer that measures the temperature of an object to be measured using thermal radiation uses Si or another element as a detector.
［この発明が解決しようとする問題点］ しかしながら、この検出素子の温度に対する出力は、非
常に大きな非線形性をもっており、測定温度範囲は限ら
れている。通常は、測温範囲に応じて検出器、リニアラ
イザを含む測定回路を異にした別個の放射温度計を複数
個用意して使い分けており、１台の放射温度計で低温か
ら高温までの測定は困難であった。[Problems to be Solved by the Invention] However, the output of the detection element with respect to temperature has a very large non-linearity, and the measurement temperature range is limited. Normally, a plurality of separate radiation thermometers with different measurement circuits including detectors and linearizers are prepared and used properly according to the temperature measurement range. One radiation thermometer can measure from low temperature to high temperature. It was difficult.
この発明の目的は、以上の点に鑑み、１台の放射温度計
で広い温度範囲の測定を可能にした放射温度計を提供す
ることである。In view of the above points, an object of the present invention is to provide a radiation thermometer capable of measuring a wide temperature range with one radiation thermometer.
［問題点を解決するための手段］ この発明は、測定対象からの放射エネルギーを電気信号
に変換する検出器と、この検出器の出力の大きさから可
変とする可変手段と、この可変手段の出力を温度に対応
した信号に変換するリニアライズ手段と、測温範囲に応
じて可変手段の増幅度とリニアライズ手段の変換定数と
を連動して切り換える制御手段とを備えるようにした放
射温度計である。[Means for Solving the Problems] The present invention relates to a detector for converting radiant energy from an object to be measured into an electric signal, a varying means for varying the magnitude of the output of the detector, and a varying means for the varying means. A radiation thermometer equipped with a linearizing means for converting an output into a signal corresponding to temperature, and a control means for interlockingly switching the amplification factor of the varying means and the conversion constant of the linearizing means according to the temperature measurement range. Is.
［実施例］ 第１図は、この発明の一実施例を示す構成説明図であ
る。[Embodiment] FIG. 1 is a structural explanatory view showing an embodiment of the present invention.
図において、１は、測定対象からの放射エネルギーを検
出するSiセルのような検出器、２は、抵抗R1、R2、R3を
スイッチS1、S2、S3で選択して増幅度（ゲイン、利得）
を可変とし、検出器１の出力の大きさを所定のレベルに
可変して増幅する可変手段としての可変利得増幅器、３
は、変換定数設定手段４の変換定数をスイッチS1′、
S2′、S3′で選択し可変利得増幅器２の出力を温度に対
応した信号に変換するリニアライズ手段、５は、リニア
ライズ手段３の出力信号を出力するための出力回路、６
は、検出器１の出力信号の大きさ、つまり測温範囲に応
じてスイッチS1、S2、S3およびスイッチS1′、S2′、
S3′を連動して切り換える制御手段である。In the figure, 1 is a detector such as a Si cell for detecting radiant energy from a measurement target, and 2 is a resistor R 1 , R 2 , R 3 selected by switches S 1 , S 2 , S 3 for amplification. Degree (gain, gain)
And a variable gain amplifier as a variable means for varying and amplifying the magnitude of the output of the detector 1 to a predetermined level.
Is the switch S 1 ′, the conversion constant of the conversion constant setting means 4,
Linearizing means 5 for converting the output of the variable gain amplifier 2 into a signal corresponding to temperature selected by S 2 ′ and S 3 ′ is an output circuit for outputting the output signal of the linearizing means 3, 6
Are switches S 1 , S 2 , S 3 and switches S 1 ′, S 2 ′, depending on the magnitude of the output signal of the detector 1, that is, the temperature measurement range.
This is a control means for switching S 3 ′ in an interlocking manner.
次に、第２図、第３図を参照して動作を説明する。Next, the operation will be described with reference to FIG. 2 and FIG.
検出器１で検出された出力信号e1は、可変利得増幅器２
に供給され、第２図で示すように、測温範囲T0〜T1、T1
〜T2、T2〜T3のどの範囲にあるかによって制御手段６
は、可変利得増幅器２のスイッチS1、S2、S3のいずれか
と、変換定数設定手段４のスイッチS1′、S2′、S3′の
いずれかと連動して切換選択してオンとする。つまり、
スイッチS1、S2、S3のいずれかをオンとすることにより
抵抗R1、R2、R3のいずれかが選択され、可変利得増幅器
２は所定の増幅度とされ、またスイッチS1′、S2′、
S3′のいずれかをオンとすることにより変換定数設定手
段４の所定の変換定数がリニアライズ手段３の変換定数
とされる。The output signal e 1 detected by the detector 1 is the variable gain amplifier 2
, And as shown in FIG. 2, the temperature measurement range T 0 to T 1 , T 1
~ T 2 , T 2 ~ T 3 depending on the range of the control means 6
Is turned on by interlocking with any one of the switches S 1 , S 2 and S 3 of the variable gain amplifier 2 and any one of the switches S 1 ′, S 2 ′ and S 3 ′ of the conversion constant setting means 4. To do. That is,
By turning on any one of the switches S 1 , S 2 and S 3 , one of the resistors R 1 , R 2 and R 3 is selected, the variable gain amplifier 2 is set to a predetermined amplification degree, and the switch S 1 ′, S 2 ′,
By turning on any of S 3 ′, the predetermined conversion constant of the conversion constant setting means 4 becomes the conversion constant of the linearizing means 3.
このことにより、第２図で示すように検出器１の出力e1
は、測温範囲に応じて可変手段としての可変利得増幅器
２により所定倍増幅されて適当な大きさの出力信号e2と
なり、この出力e2は、リニアライズ手段３により、各測
温範囲に応じた可変利得増幅器２の出力に最適な変換定
数でリニアライズ変換され、第３図で示すように温度に
対してリニア（直線的）な関係の温度に対応した出力e3
が取り出せる。この出力e3は、出力回路５を通じて外部
に出力され、指示、記録、制御、その他に使用される。As a result, the output e 1 of the detector 1 as shown in FIG.
Is amplified by a variable gain amplifier 2 as a variable means by a predetermined factor in accordance with the temperature measuring range and becomes an output signal e 2 having an appropriate magnitude. This output e 2 is output to each temperature measuring range by the linearizing means 3. The output of the corresponding variable gain amplifier 2 is linearized and converted by an optimum conversion constant, and the output e 3 corresponding to the temperature having a linear relationship with the temperature as shown in FIG.
Can be taken out. The output e 3 is output to the outside through the output circuit 5 and used for instruction, recording, control, and the like.
このように、測温範囲に応じて可変利得増幅器２の利
得、およびリニアライズの変換定数を連動して切り換え
ることにより、単一の放射温度計で常温から3000℃位ま
での測定が可能となる。たとえば、検出器１にSiを用い
多少側温範囲を重複させ、300〜700℃、600〜1200℃、1
100〜3000℃というような測温範囲とするとよい。In this way, by switching the gain of the variable gain amplifier 2 and the conversion constant of linearization in accordance with the temperature measurement range, it is possible to measure from room temperature to 3000 ° C. with a single radiation thermometer. . For example, using Si for the detector 1 and overlapping the side temperature ranges to some extent, 300 to 700 ° C, 600 to 1200 ° C, 1
It is recommended that the temperature measurement range be 100 to 3000 ° C.
また、第４図で示すようにリニアライズ手段３、制御手
段６をマイクロコンピュータのような演算制御手段で構
成し、変換定数設定手段４の変換定数をメモリに記憶さ
せるようにしてもよい。また、この例では、検出器１の
出力の大きさを可変とする可変手段として、可変利得増
幅器の代わりに、検出器１に並列に接続された負荷抵抗
R1、R2、R3、スイッチS1、S2、S3よりなる可変負荷抵抗
10を用いている。Further, as shown in FIG. 4, the linearizing means 3 and the control means 6 may be constituted by arithmetic control means such as a microcomputer, and the conversion constant of the conversion constant setting means 4 may be stored in a memory. Further, in this example, as the variable means for varying the magnitude of the output of the detector 1, instead of the variable gain amplifier, a load resistor connected in parallel to the detector 1 is used.
Variable load resistance consisting of R 1 , R 2 , R 3 and switches S 1 , S 2 , S 3
10 is used.
第４図において、第１図と同一符号は同一構成要素を示
し、検出器１の出力e1は、マイクロコンピュータのよう
な演算制御手段８により測温範囲に応じてスイッチS1、
S2、S3をオンとして負荷抵抗R1、R2、R3を選択して所定
の増幅度が選択され、所定倍増幅される。この可変手段
としての可変負荷抵抗10の出力e2は、プリアンプ２′、
Ａ−Ｄ変換器７でデジタル信号とされ、演算制御手段８
により、測温範囲に応じて可変手段10の増幅度の切り換
えと連動して所定の変換定数をメモリ９より読み出し、
リニアライズ変換の演算を行い、出力回路５より出力e3
を取り出すようにしている。出力信号e1、e2、e3の様子
は第２図、第３図と同様である。4, the same reference numerals as those in FIG. 1 indicate the same constituent elements, and the output e 1 of the detector 1 is switched to the switch S 1 according to the temperature measurement range by the arithmetic control means 8 such as a microcomputer.
Predetermined amplification degree is selected by selecting S 2, S 3 the load resistance R 1 as ON, R 2, R 3, is a predetermined multiple amplification. The output e 2 of the variable load resistor 10 as the variable means is the preamplifier 2 ′,
The A / D converter 7 converts it into a digital signal, and the arithmetic control means 8
According to the temperature measurement range, the predetermined conversion constant is read from the memory 9 in conjunction with the switching of the amplification degree of the variable means 10.
Performs linearization conversion operation and outputs from output circuit 5 e 3
I'm trying to take out. The states of the output signals e 1 , e 2 and e 3 are the same as in FIGS. 2 and 3.
このように、可変手段の増幅度の可変は、可変利得増幅
器の帰還抵抗による増幅度の可変または、可変負荷抵抗
の負荷抵抗による増幅度の可変のいずれでもよく、Si素
子その他の素子の出力を飽和させることなく使用でき
る。また、各温度領域におけるベース分の補償、加算
は、リニアライズ手段、または出力回路のいずれで行っ
てもよい。As described above, the variable amplification degree of the variable means may be either variable amplification degree by the feedback resistance of the variable gain amplifier or variable amplification degree by the load resistance of the variable load resistance. Can be used without saturating. Further, the compensation and addition for the base amount in each temperature region may be performed by either the linearizing means or the output circuit.
［発明の効果］ 以上述べたように、この発明は、測温範囲に応じて可変
手段の増幅度およびリニアライズ手段の変換定数を連動
して切り変えるようにしているので、単一の放射温度計
で、広い範囲の測温が高精度に可能となり、多くの用途
に使用できる。[Effects of the Invention] As described above, according to the present invention, the amplification degree of the variable means and the conversion constant of the linearization means are switched in conjunction with each other in accordance with the temperature measurement range. The meter can measure a wide range of temperature with high accuracy and can be used for many purposes.
第１図は、第４図は、この発明の一実施例を示す構成説
明図、第２図、第３図は、動作説明図である。 １……検出器、２……可変利得増幅器（可変手段）、３
……リニアライズ手段、４……変換定数設定手段、５…
…出力回路、６……制御手段、７……Ａ−Ｄ変換器、８
……演算制御手段、９……メモリ、10……可変負荷抵抗FIG. 1, FIG. 4 are configuration explanatory views showing an embodiment of the present invention, and FIGS. 2 and 3 are operation explanatory views. 1 ... Detector, 2 ... Variable gain amplifier (variable means), 3
...... Linearizing means, 4 …… Conversion constant setting means, 5 ...
... output circuit, 6 ... control means, 7 ... AD converter, 8
...... Computational control means, 9 ... Memory, 10 ... Variable load resistance
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−102128（ＪＰ，Ａ) 特開 昭57−84323（ＪＰ，Ａ) 特開 昭56−57292（ＪＰ，Ａ) 実公 昭53−45035（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-102128 (JP, A) JP-A-57-84323 (JP, A) JP-A-56-57292 (JP, A) Actual publication 53- 45035 (JP, Y2)
Claims (1)
に変換し出力を発生する検出器と、この検出器の出力を
複数の測温範囲に応じて所定倍してその大きさを可変と
し適当な大きさの出力とする複数の帰還抵抗をスイッチ
で切換選択する可変利得増幅器または複数の負荷抵抗を
スイッチで切換選択する可変負荷抵抗よりなる可変手段
と、この測温範囲に応じて適当な大きさとされた可変手
段の出力を温度に対応した信号に変換する複数の変換定
数を有するリニアライズ手段と、前記検出器の出力信号
がどの測温範囲にあるかに応じて前記可変手段のスイッ
チを切換選択することにより可変とされる増幅度とこの
測温範囲に応じたリニアライズ手段の変換定数とを連動
して切り換える制御手段とを備えたことを特徴とする放
射温度計。1. A detector for converting radiant energy from an object to be measured into an electric signal to generate an output, and an output of the detector is multiplied by a predetermined number in accordance with a plurality of temperature measuring ranges to make its size variable. A variable gain amplifier for switching and selecting a plurality of feedback resistors for output of various sizes or a variable load resistor for selecting a plurality of load resistors for switching, and an appropriate size according to the temperature measuring range. The linearizing means having a plurality of conversion constants for converting the output of the variable means into a signal corresponding to temperature; and the switch of the varying means depending on which temperature measuring range the output signal of the detector is in. A radiation thermometer, comprising: a control means for interlockingly switching the amplification degree that is variable by switching selection and the conversion constant of the linearizing means according to the temperature measurement range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60026711A JPH0665973B2 (en) | 1985-02-14 | 1985-02-14 | Radiation thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60026711A JPH0665973B2 (en) | 1985-02-14 | 1985-02-14 | Radiation thermometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61186824A JPS61186824A (en) | 1986-08-20 |
| JPH0665973B2 true JPH0665973B2 (en) | 1994-08-24 |
Family
ID=12200944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60026711A Expired - Fee Related JPH0665973B2 (en) | 1985-02-14 | 1985-02-14 | Radiation thermometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0665973B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4004408A1 (en) * | 1990-02-13 | 1991-08-14 | Ultrakust Electronic Gmbh | IR temp. sensor for high temps. |
| JP2012083158A (en) * | 2010-10-08 | 2012-04-26 | Mitsubishi Electric Corp | Radar device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5345035U (en) * | 1976-09-21 | 1978-04-17 | ||
| JPS57102128A (en) * | 1980-12-18 | 1982-06-25 | Katsutoshi Kai | Growing of seed pig in small body and propagating same |
-
1985
- 1985-02-14 JP JP60026711A patent/JPH0665973B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61186824A (en) | 1986-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |