JPS5994025A - Color thermometer - Google Patents
Color thermometerInfo
- Publication number
- JPS5994025A JPS5994025A JP20385282A JP20385282A JPS5994025A JP S5994025 A JPS5994025 A JP S5994025A JP 20385282 A JP20385282 A JP 20385282A JP 20385282 A JP20385282 A JP 20385282A JP S5994025 A JPS5994025 A JP S5994025A
- Authority
- JP
- Japan
- Prior art keywords
- output
- down counter
- circuit
- electrical signals
- color temperature
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- YQEZLKZALYSWHR-UHFFFAOYSA-N Ketamine Chemical compound C=1C=CC=C(Cl)C=1C1(NC)CCCCC1=O YQEZLKZALYSWHR-UHFFFAOYSA-N 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
- G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、ある温度の黒体から輻射される光線の波長
ごとの輝度分布が、ライ／・ブランクの法則に従って黒
体の温度により異なることに基づき、２つの異なった波
長域の輝度の比を検出し、その比によって温度を決定す
る色温度計に関し、特Ｋ、比を得る割算回路をＤ ／
Ａ変換器および計数回路などにより構成したものである
。[Detailed Description of the Invention] This invention is based on the fact that the luminance distribution for each wavelength of light rays radiated from a black body at a certain temperature differs depending on the temperature of the black body according to Lye/Blank's law. Regarding a color thermometer that detects the ratio of brightness in a wavelength range and determines the temperature based on that ratio, a special K and a division circuit to obtain the ratio are D/
It consists of an A converter, a counting circuit, etc.
第１図に示すように、被測温物体（７）から輻射された
光線（８）を受光レンズ（９）、通過波長が異なる２種
のフィルタ（ＩＡ） 、 （ｔｎ）を有する回転フィル
タ（１）を経て光電変換素子（２）へ入射させる光学系
を備えている。As shown in Fig. 1, the light beam (8) radiated from the object to be measured (7) is passed through a light receiving lens (9), and a rotating filter (IA) and (tn) having two types of filters (IA) and (tn) with different passing wavelengths. The optical system includes an optical system that causes the light to enter the photoelectric conversion element (2) through the photoelectric conversion element (2).
この回転フィルタ（１）は、モータ（５）によって回転
させられるものであり、モータ（５）には、回転フィル
タ（１）のほか［２相交流発電機（６）が連結されてい
る。This rotary filter (1) is rotated by a motor (5), and a two-phase alternating current generator (6) is connected to the motor (5) in addition to the rotary filter (1).
さらに、２相交流発電機（６）の出力を利用して、光電
変換素子（２）の電気的出力を、２種のフィルタ（ＩＡ
） 、 （ＩＢ）を通過した光線の波長成分の輝度に対
応する２つの出力に分離する分離回路（３）と、分離さ
れた各出力をそれぞれ直流信号にダする同期整流回路（
４Ａ） 、 （４Ｂ）と、これら２つの同期整流回路（
４Ａ） 、（４Ｂ）の出力の比を得る割算回路◇０と、
この割算回路（１００比出方を指示する指示器−とを具
備している。Furthermore, using the output of the two-phase alternating current generator (6), the electrical output of the photoelectric conversion element (2) is controlled by two types of filters (IA
), (IB), a separation circuit (3) that separates the light beam into two outputs corresponding to the brightness of the wavelength component, and a synchronous rectification circuit (3) that converts each separated output into a DC signal.
4A), (4B), and these two synchronous rectifier circuits (
A division circuit that obtains the ratio of the outputs of 4A) and (4B) ◇0,
It is equipped with this division circuit (an indicator that indicates how to output a 100 ratio).
割算回路（Ｉｆ＞は、第２図に示すよ５Ｋ、２つの入力
端子（ＩＯＡ） 、 （ＩＯＢ）と、一方の端子（ＩＯ
Ｂ）が基−準電圧端子（ｒｅｆ ）に接続され、さらに
、ＢＣＩ）入力端子を有するＤ／Ａ変換器θηと、この
Ｄ／Ａ変換器ａ◇のアナログ出力と一方の端子（ＩＯＡ
）からの出力との差を得る減算回路ｏ４と、この減算回
路◇→の出力の絶対値を得る絶対値増幅器◇０と、この
絶対値増幅器０うの出力により発振周波数が変化する可
変周波数発振器０■と、この発振器□■の出方を計数し
、その計数値をＢＣＤ信号で出力するアップ・ダウン・
カウンタα埠と、減算回路◇◆の出方の極性を判別して
、カウンタ０１の計数方向を指示する極性判別回路ＯＱ
とから構成されている。The divider circuit (If> is 5K, as shown in Figure 2, has two input terminals (IOA) and (IOB), and one terminal (IO
B) is connected to a reference voltage terminal (ref), and a D/A converter θη having a BCI) input terminal is connected to the analog output of this D/A converter a◇ and one terminal (IOA
), an absolute value amplifier ◇0 that obtains the absolute value of the output of this subtracting circuit ◇→, and a variable frequency oscillator whose oscillation frequency changes depending on the output of this absolute value amplifier 0. 0 ■ and the output of this oscillator □■, and outputs the counted value as a BCD signal.
A polarity determination circuit OQ that determines the polarity of the output of the counter α and the subtraction circuit ◇◆ and instructs the counting direction of the counter 01.
It is composed of.
さらに、カウンタｏ３のＢＣＤ信号の出力端子をＲＯＭ
＋１？）の各７ドレスに記憶された１１Ｕを指示する指
示器四を備えている。Furthermore, the output terminal of the BCD signal of counter o3 is connected to the ROM.
+1? ) is provided with four indicators for indicating 11U stored in each of the seven dresses.
次に、以上のように構成されたこの発明の色温度計の動
作を説明する。Next, the operation of the color thermometer of the present invention configured as described above will be explained.
被測温物体（７）から輻射された光線（８）を、回転フ
ィルタ（１）を経て充電変換素子（２）へ入射させると
、充電変換素子（２ンからは、回転ンイ／ｂり（１）を
通過した光線の輝度に対応した第３図Ｃに示す波形の出
力が得られるから、これを分離回路（３）において２相
交流発電機（６）の出力を用いて２種のフィルタ分離し
、同期整流回路（４Ａ） 、（４Ｂ）でそれぞれ直流化
すると、波高値ａ＋ｂに対応した２つの直流電圧を得る
ことができる。When the light beam (8) radiated from the object to be measured (7) passes through the rotating filter (1) and enters the charging conversion element (2), from the charging conversion element (2), the rotation 1), an output with the waveform shown in Figure 3C corresponding to the brightness of the light beam that has passed through the filter is obtained, and this is sent to the separation circuit (3) using the output of the two-phase alternating current generator (6) to pass through two types of filters. By separating the voltages and converting them into DC voltages using synchronous rectification circuits (4A) and (4B), two DC voltages corresponding to peak values a+b can be obtained.
これら２つの直流電圧は、それぞれ割算回路（１１の２
つの入力端子（ＩＯＡ） 、（１ｏａ）に印加される。These two DC voltages are each divided by a divider circuit (11 of 2
It is applied to two input terminals (IOA) and (1OA).
Ｄ／Ａ変換器Ｑρは、基準電圧端子（ｒｅｆ）に印加さ
れた電圧ｖＢと、ＢＣＤＣＤ入子端子加されたデジタル
信号ＶＤとの積に比例したアナログ出力ＶＸ。The D/A converter Qρ outputs an analog output VX proportional to the product of the voltage vB applied to the reference voltage terminal (ref) and the digital signal VD applied to the BCDCD nested terminal.
すなわち、
Ｖｘ ＝ ＶＢ−ＶＤ −・−−−−（ＩＩなるアナロ
グ出力を発生するから、減算回路０◆において、この７
ナーグ出力ＶＸと入力端子（１０Ａ）に印加された電圧
ｖＡとを比較し、両者の差電圧Ｖｓ ＝ ＶＸ 〜ＶＡ
−−−−・（２）を得る。In other words, Vx = VB-VD -・----(Since the analog output II is generated, in the subtraction circuit 0◆, this 7
Compare the Nag output VX and the voltage vA applied to the input terminal (10A), and calculate the difference voltage between them Vs = VX ~ VA
-----・(2) is obtained.
この差電圧Ｖｓは、絶対値増幅器ｕつに印加されて増幅
されたのち、可変周波数発振器（１１を駆動し、差電圧
ｖＢの絶対値に比例した周波数の発振出力を得ると共に
、差電圧ＶＳは、極性判別回路０６１１ｃも印加されて
その極性の判別を行なう。This differential voltage Vs is applied to and amplified by two absolute value amplifiers, and then drives a variable frequency oscillator (11) to obtain an oscillation output with a frequency proportional to the absolute value of the differential voltage vB. , a polarity determining circuit 0611c is also applied to determine the polarity.
可変周波数発振器θ４の発振出力は、極性判別回路（国
の出力と共に７ノブ・タウン・カウンタα罎に印加され
、極性判別回路（ＩＢの出力に応じてアンプまたはダウ
ン方向に可変周波数発振器Ｑ匂の発振出力な計数し、そ
の計数値をＤ ／ Ａ変換器００とＲＯＭ０ηに導（。The oscillation output of the variable frequency oscillator θ4 is applied to the 7-knob town counter α along with the output of the polarity discrimination circuit (IB), and is applied to the amplifier or down direction of the variable frequency oscillator Q according to the output of the polarity discrimination circuit (IB). The oscillation output is counted and the counted value is led to the D/A converter 00 and ROM0η.
そして、このカウンタＱ３の計数値が、基準電圧力がな
くなるので、発振器０擾の発振が停止し、カウンタ０罎
はそれまでの計数値を保持し続ける。Since the reference voltage is no longer present, the oscillator 0 stops oscillating, and the counter 0 continues to hold the count value up to that point.
このとき、カウンタ０１に保持された計数値ＶＤは、上
記式（１１より
■Ｄ：２ｖＸ／ＶＢ・・・・（３）
となり、また、ＶＸ ” ＶＡになるからＶＩ）＝ｖＡ
／／ｖＢ ・−＝ ＜４）が得られ、２つの入力端子
（ＩＯＡ） 、（ＩＯＢ）に印加された２つのアナグロ
電圧の比ＶＡ／ＶＢをＢＣＤ信号として得ることができ
る。At this time, the count value VD held in the counter 01 becomes the above formula (from 11, ■D: 2vX/VB... (3), and since VX '' VA becomes VI) = vA
//vB .-=<4) is obtained, and the ratio VA/VB of the two analog voltages applied to the two input terminals (IOA) and (IOB) can be obtained as a BCD signal.
一方、ＲＯＭ０？＋には、比を表わすＢＣＤ信号と色温
度との対応テーブルが記憶されているので、比を表わす
ＢＣＤ信号で７ドレスすることにより、色温度を出力さ
せ、それを指示器（至）で指示せしめるのである。On the other hand, ROM0? + stores a correspondence table between the BCD signal that represents the ratio and the color temperature, so by dressing the BCD signal that represents the ratio by 7, the color temperature is output, and it is indicated by the indicator (To). It forces you.
以上で説明したように、この発明の色温度計によると、
１つのＡ ／−ｏ変換器を用いるだけで、２つのアナロ
グ信号の比を得ると同時に、その比のデジタル値を得る
ことができる。As explained above, according to the color thermometer of this invention,
By using only one A/-O converter, it is possible to obtain the ratio of two analog signals and at the same time obtain the digital value of that ratio.
第１図は、この発明の色温度計の一実施例を示すブーツ
ク図、第２図は、第１図の装置の要部である割算回路の
回路図、第３図は、第１図の装置の動作を説明するため
に利用する波形図である。
１・・−・ 回転フィルタ
２・・・・光電変換素子
３・・・・分離回路
４Ａ、４Ｂ・・・・整流回路
１０・・・・・割算回路
１１・・・・・Ａ／Ｄ変換器
１２・・ 発振器
１３・・・・・アップ・ダウン・カウンタ１４・・・・
・減勢回路
１７・・・・ＲＯＭ
２０・・・・・指示器FIG. 1 is a boot diagram showing an embodiment of the color thermometer of the present invention, FIG. 2 is a circuit diagram of a dividing circuit which is a main part of the device shown in FIG. 1, and FIG. FIG. 3 is a waveform diagram used to explain the operation of the device. 1... Rotating filter 2... Photoelectric conversion element 3... Separation circuit 4A, 4B... Rectifier circuit 10... Division circuit 11... A/D conversion Unit 12... Oscillator 13... Up/down counter 14...
・Deenergization circuit 17...ROM 20...Indicator
Claims (1)
分の輝度に対応した２つの電気信号を得る手段と、色温
度に対応した上記２つの電気信号の比を得る割算回路と
を具備する色温度計において、上記割算回路は、発振器
と、該発振器の出力を計数するアンプ・ダウン・カウン
タと、上記２つの電気信号のうちの一方が印加される基
準電圧入力端子および上記アップ・ダウン・カウンタの
ＢＣＤ出力が印加されるデジタル入力端子を有し、アナ
ログ電圧を出力するＤ ／ Ａ変換器と、上記２つの電
気信号のうちの他方と上記７すｐグミ圧とを比較し両者
の差に基づいて上記アンプ・ダウン・カウンタの計数動
作を制御する減算回路とを有し、上記アンプ・ダウン・
カゾンタのＢＣＤ出力を上記２つの電気信号の比に対応
させることを特徴とする色温度計Equipped with means for obtaining two electrical signals corresponding to the brightness of two wavelength components included in the light beam radiated from the temperature-measuring object, and a division circuit for obtaining the ratio of the two electrical signals corresponding to the color temperature. In the color thermometer, the dividing circuit includes an oscillator, an amplifier down counter that counts the output of the oscillator, a reference voltage input terminal to which one of the two electrical signals is applied, and the up/down counter. A D/A converter that has a digital input terminal to which the BCD output of the down counter is applied and outputs an analog voltage compares the other of the two electrical signals with the 7p gummy pressure and compares both. and a subtraction circuit that controls the counting operation of the amplifier down counter based on the difference between the amplifier down counter and the amplifier down counter.
A color temperature meter characterized in that the BCD output of the Kazonta corresponds to the ratio of the two electrical signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20385282A JPS5994025A (en) | 1982-11-20 | 1982-11-20 | Color thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20385282A JPS5994025A (en) | 1982-11-20 | 1982-11-20 | Color thermometer |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23396883A Division JPS59170972A (en) | 1983-12-12 | 1983-12-12 | Divider circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5994025A true JPS5994025A (en) | 1984-05-30 |
| JPH0331210B2 JPH0331210B2 (en) | 1991-05-02 |
Family
ID=16480758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20385282A Granted JPS5994025A (en) | 1982-11-20 | 1982-11-20 | Color thermometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5994025A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129727A (en) * | 1985-12-02 | 1987-06-12 | Nippon Abionikusu Kk | Radiation energy camera |
| GB2376365A (en) * | 2001-04-04 | 2002-12-11 | Noritake Co Ltd | Temperature measuring method and apparatus |
-
1982
- 1982-11-20 JP JP20385282A patent/JPS5994025A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62129727A (en) * | 1985-12-02 | 1987-06-12 | Nippon Abionikusu Kk | Radiation energy camera |
| GB2376365A (en) * | 2001-04-04 | 2002-12-11 | Noritake Co Ltd | Temperature measuring method and apparatus |
| US6817758B2 (en) | 2001-04-04 | 2004-11-16 | Noritake Co., Limited | Temperature distribution measuring method and apparatus |
| GB2376365B (en) * | 2001-04-04 | 2005-01-05 | Noritake Co Ltd | Temperature distribution measuring method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0331210B2 (en) | 1991-05-02 |
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