JPH01126548U - - Google Patents
Info
- Publication number
- JPH01126548U JPH01126548U JP2174288U JP2174288U JPH01126548U JP H01126548 U JPH01126548 U JP H01126548U JP 2174288 U JP2174288 U JP 2174288U JP 2174288 U JP2174288 U JP 2174288U JP H01126548 U JPH01126548 U JP H01126548U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- intensity
- emitting means
- photoelectric conversion
- 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
Landscapes
- Investigating Or Analysing Biological Materials (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
第１図は本考案実施例の液比重測定装置を示す
図、第２図は実施例の回路を示す図、第３図は実
施例における温度補償回路を示す図、第４図は実
施例における信号処理過程の一例を示す図、第５
図は従来の屈折計の原理を説明する図である。
５…導光体、１１…発光ダイオード、１２…変
調回路、１３…ＬＥＤ駆動回路、１４…比較増幅
器、１５…帰還用フオトダイオード、１７…ハイ
パスフイルター、２１…検出用フオトダイオード
、２３…ハイパスフイルター、２９…較正回路、
３３…６点ＬＥＤ表示器、ＳＷ２…較正／測定切
換スイツチ。
Fig. 1 is a diagram showing a liquid specific gravity measuring device according to an embodiment of the present invention, Fig. 2 is a diagram showing a circuit of the embodiment, Fig. 3 is a diagram showing a temperature compensation circuit in the embodiment, and Fig. 4 is a diagram showing a temperature compensation circuit in the embodiment. Diagram 5 showing an example of the signal processing process
The figure is a diagram explaining the principle of a conventional refractometer. 5... Light guide, 11... Light emitting diode, 12... Modulation circuit, 13... LED drive circuit, 14... Comparison amplifier, 15... Feedback photo diode, 17... High pass filter, 21... Detection photo diode, 23... High pass filter , 29... Calibration circuit,
33... 6-point LED display, SW 2 ... Calibration/measurement changeover switch.
Claims (1)
波数でパルス発光する発光手段と、 上記発光手段からの光を受光して受光量の増減
に反比例して増減する制御電圧を上記発光手段に
供給する発光量制御手段と、 試料液に浸され上記発光手段からの光を少なく
とも一回の反射を行つて導光する導光体と、 上記導光体によつて導光された光を受光して該
受光した光の前記一定周波数の成分の強度に応じ
た強度の信号を出力する光電変換手段と、 外部からの操作によつて上記光電変換手段の出
力強度を変化させる外部補正手段と、 上記外部補正手段の出力信号の強度に対応する
表示を行う表示手段と、 を備えたことを特徴とする液比重測定装置。[Scope of Claim for Utility Model Registration] A light emitting means that emits pulsed light at a constant frequency with an intensity corresponding to a supplied control voltage, and a light emitting means that receives light from the light emitting means and increases or decreases in inverse proportion to the increase or decrease in the amount of light received. a light emitting amount control means for supplying a control voltage to the light emitting means; a light guide that is immersed in a sample liquid and guides the light from the light emitting means by reflecting at least once; photoelectric conversion means for receiving the guided light and outputting a signal with an intensity corresponding to the intensity of the constant frequency component of the received light; and controlling the output intensity of the photoelectric conversion means by external operation. A liquid specific gravity measuring device comprising: external correction means for changing the intensity of the output signal; and display means for displaying a display corresponding to the intensity of the output signal of the external correction means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2174288U JPH01126548U (en) | 1988-02-23 | 1988-02-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2174288U JPH01126548U (en) | 1988-02-23 | 1988-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01126548U true JPH01126548U (en) | 1989-08-29 |
Family
ID=31239239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2174288U Pending JPH01126548U (en) | 1988-02-23 | 1988-02-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01126548U (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57147037A (en) * | 1981-01-30 | 1982-09-10 | Battelle Memorial Institute | Liquid refractive index measuring apparatus in terms of reference temperature |
| JPS593243A (en) * | 1982-06-30 | 1984-01-09 | Stanley Electric Co Ltd | Liquid densitometer |
| JPS5990032A (en) * | 1982-11-15 | 1984-05-24 | Nippon Beet Sugar Mfg Co Ltd | Device for measuring density, concentration, specific gravity or the like of liquid |
| JPS62206431A (en) * | 1986-03-07 | 1987-09-10 | Ricoh Co Ltd | Liquid refractive index measuring device |
| JPS62228142A (en) * | 1985-12-12 | 1987-10-07 | Nippon Kokan Kk <Nkk> | optical densitometer |
-
1988
- 1988-02-23 JP JP2174288U patent/JPH01126548U/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57147037A (en) * | 1981-01-30 | 1982-09-10 | Battelle Memorial Institute | Liquid refractive index measuring apparatus in terms of reference temperature |
| JPS593243A (en) * | 1982-06-30 | 1984-01-09 | Stanley Electric Co Ltd | Liquid densitometer |
| JPS5990032A (en) * | 1982-11-15 | 1984-05-24 | Nippon Beet Sugar Mfg Co Ltd | Device for measuring density, concentration, specific gravity or the like of liquid |
| JPS62228142A (en) * | 1985-12-12 | 1987-10-07 | Nippon Kokan Kk <Nkk> | optical densitometer |
| JPS62206431A (en) * | 1986-03-07 | 1987-09-10 | Ricoh Co Ltd | Liquid refractive index measuring device |
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